drivers/: Change some nerr() ERRORS to ninfo() and nwarn() WARNINGS.

drivers/bch/bchdev_register.c

@@ -86,7 +86,7 @@ int bchdev_register(FAR const char *blkdev, FAR const char *chardev,
   ret = bchlib_setup(blkdev, readonly, &handle);
   if (ret < 0)
     {
-      ferr("bchlib_setup failed: %d\n", -ret);
+      ferr("ERROR: bchlib_setup failed: %d\n", -ret);
       return ret;
     }
 
@@ -95,7 +95,7 @@ int bchdev_register(FAR const char *blkdev, FAR const char *chardev,
   ret = register_driver(chardev, &bch_fops, 0666, handle);
   if (ret < 0)
     {
-      ferr("register_driver failed: %d\n", -ret);
+      ferr("ERROR: register_driver failed: %d\n", -ret);
       bchlib_teardown(handle);
       handle = NULL;
     }

drivers/bch/bchdev_unregister.c

@@ -103,7 +103,7 @@ int bchdev_unregister(FAR const char *chardev)
   fd = open(chardev, O_RDONLY);
   if (fd < 0)
     {
-      err("Failed to open %s: %d\n", chardev, errno);
+      err("ERROR: Failed to open %s: %d\n", chardev, errno);
       return -errno;
     }
 
@@ -116,7 +116,7 @@ int bchdev_unregister(FAR const char *chardev)
 
   if (ret < 0)
     {
-      err("ioctl failed: %d\n", errno);
+      err("ERROR: ioctl failed: %d\n", errno);
       return -errno;
     }
 

drivers/bch/bchlib_read.c

@@ -160,7 +160,7 @@ ssize_t bchlib_read(FAR void *handle, FAR char *buffer, size_t offset, size_t le
                                        sector, nsectors);
       if (ret < 0)
         {
-          ferr("Read failed: %d\n");
+          ferr("ERROR: Read failed: %d\n");
           return ret;
         }
 

drivers/bch/bchlib_setup.c

@@ -96,7 +96,7 @@ int bchlib_setup(const char *blkdev, bool readonly, FAR void **handle)
   bch = (FAR struct bchlib_s *)kmm_zalloc(sizeof(struct bchlib_s));
   if (!bch)
     {
-      ferr("Failed to allocate BCH structure\n");
+      ferr("ERROR: Failed to allocate BCH structure\n");
       return -ENOMEM;
     }
 
@@ -105,7 +105,7 @@ int bchlib_setup(const char *blkdev, bool readonly, FAR void **handle)
   ret = open_blockdriver(blkdev, readonly ? MS_RDONLY : 0, &bch->inode);
   if (ret < 0)
     {
-      ferr("Failed to open driver %s: %d\n", blkdev, -ret);
+      ferr("ERROR: Failed to open driver %s: %d\n", blkdev, -ret);
       goto errout_with_bch;
     }
 
@@ -114,20 +114,20 @@ int bchlib_setup(const char *blkdev, bool readonly, FAR void **handle)
   ret = bch->inode->u.i_bops->geometry(bch->inode, &geo);
   if (ret < 0)
     {
-      ferr("geometry failed: %d\n", -ret);
+      ferr("ERROR: geometry failed: %d\n", -ret);
       goto errout_with_bch;
     }
 
   if (!geo.geo_available)
     {
-      ferr("geometry failed: %d\n", -ret);
+      ferr("ERROR: geometry failed: %d\n", -ret);
       ret = -ENODEV;
       goto errout_with_bch;
     }
 
   if (!readonly && (!bch->inode->u.i_bops->write || !geo.geo_writeenabled))
     {
-      ferr("write access not supported\n");
+      ferr("ERROR: write access not supported\n");
       ret = -EACCES;
       goto errout_with_bch;
     }
@@ -145,7 +145,7 @@ int bchlib_setup(const char *blkdev, bool readonly, FAR void **handle)
   bch->buffer = (FAR uint8_t *)kmm_malloc(bch->sectsize);
   if (!bch->buffer)
     {
-      ferr("Failed to allocate sector buffer\n");
+      ferr("ERROR: Failed to allocate sector buffer\n");
       ret = -ENOMEM;
       goto errout_with_bch;
     }

drivers/bch/bchlib_write.c

@@ -162,7 +162,7 @@ ssize_t bchlib_write(FAR void *handle, FAR const char *buffer, size_t offset, si
                                         sector, nsectors);
       if (ret < 0)
         {
-          ferr("Write failed: %d\n", ret);
+          ferr("ERROR: Write failed: %d\n", ret);
           return ret;
         }
 
@@ -204,7 +204,7 @@ ssize_t bchlib_write(FAR void *handle, FAR const char *buffer, size_t offset, si
   ret = bchlib_flushsector(bch);
   if (ret < 0)
     {
-      ferr("Flush failed: %d\n", ret);
+      ferr("ERROR: Flush failed: %d\n", ret);
       return ret;
     }