kfifo: Fix comments

Fix some typo.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

include/linux/kfifo.h

@@ -325,7 +325,7 @@ __kfifo_uint_must_check_helper( \
  *
  * This macro dynamically allocates a new fifo buffer.
  *
- * The numer of elements will be rounded-up to a power of 2.
+ * The number of elements will be rounded-up to a power of 2.
  * The fifo will be release with kfifo_free().
  * Return 0 if no error, otherwise an error code.
  */
@@ -358,9 +358,9 @@ __kfifo_int_must_check_helper( \
  * @buffer: the preallocated buffer to be used
  * @size: the size of the internal buffer, this have to be a power of 2
  *
- * This macro initialize a fifo using a preallocated buffer.
+ * This macro initializes a fifo using a preallocated buffer.
  *
- * The numer of elements will be rounded-up to a power of 2.
+ * The number of elements will be rounded-up to a power of 2.
  * Return 0 if no error, otherwise an error code.
  */
 #define kfifo_init(fifo, buffer, size) \