include/linux/bitops.h: spelling s/synomyn/synonym/

Fix a misspelling of "synonym".

Link: https://lkml.kernel.org/r/20210108105305.2028120-1-geert+renesas@glider.beSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/bitops.h

@@ -214,7 +214,7 @@ static inline int get_count_order_long(unsigned long l)
  * __ffs64 - find first set bit in a 64 bit word
  * @word: The 64 bit word
  *
- * On 64 bit arches this is a synomyn for __ffs
+ * On 64 bit arches this is a synonym for __ffs
  * The result is not defined if no bits are set, so check that @word
  * is non-zero before calling this.
  */