Revert "Don't call lib_free in the kernel code"

This reverts commit 7884c18620.

drivers/crypto/dev_urandom.c

@@ -37,6 +37,7 @@
 #include <errno.h>
 #include <assert.h>
 
+#include <nuttx/lib/lib.h>
 #include <nuttx/lib/xorshift128.h>
 #include <nuttx/semaphore.h>
 #include <nuttx/fs/fs.h>

drivers/net/telnet.c

@@ -720,7 +720,7 @@ static int telnet_close(FAR struct file *filep)
                 }
             }
 
-          kmm_free(devpath);
+          lib_free(devpath);
         }
 
       for (i = 0; i < CONFIG_TELNET_MAXLCLIENTS; i++)

drivers/wireless/gs2200m.c

@@ -3542,7 +3542,7 @@ FAR void *gs2200m_register(FAR const char *devpath,
 
 errout:
   nxmutex_destroy(&dev->dev_lock);
-  kmm_free(dev->path);
+  lib_free(dev->path);
   kmm_free(dev);
   return NULL;
 }