Fix some spacing problems

drivers/mtd/at45db.c

@@ -640,7 +640,7 @@ static ssize_t at45db_bread(FAR struct mtd_dev_s *mtd, off_t startblock,
   FAR struct at45db_dev_s *priv = (FAR struct at45db_dev_s *)mtd;
   ssize_t nbytes;
 
- /* On this device, we can handle the block read just like the byte-oriented read */
+  /* On this device, we can handle the block read just like the byte-oriented read */
 
   nbytes = at45db_read(mtd, startblock << priv->pageshift,
                        nblocks << priv->pageshift, buffer);

drivers/mtd/mtd_nand.c

@@ -540,7 +540,7 @@ static int nand_writepage(FAR struct nand_dev_s *nand, off_t block,
    * ECC calculations.
    */
 
- else
+  else
 #endif
     {
       return NAND_WRITEPAGE(nand->raw, block, page, data, NULL);

drivers/mtd/mtd_onfi.c

@@ -88,7 +88,7 @@
 #define EBICSA_EBI_DBPDC         (1 << 9)
 #define EBICSA_NAND_D0_ON_D16    (1 << 24)
 
- /* Misc. definitions */
+/* Misc. definitions */
 
 #define MAX_READ_STATUS_COUNT    100000 /* Read status timeout */
 #define ONFI_PARAM_TABLE_SIZE    116    /* Not all 256 bytes are useful */

drivers/mtd/st25fl1.c

@@ -644,9 +644,9 @@ static inline int st25fl1_readid(struct st25fl1_dev_s *priv)
       default:
         fdbg("ERROR: Unsupported memory capacity: %02x\n", priv->cmdbuf[2]);
         return -ENODEV;
-   }
+    }
 
- return OK;
+  return OK;
 }
 
 /************************************************************************************