locking/rwsem: Fix comment typo

s/folowing/following/

Signed-off-by: Bhaskar Chowdhury <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>
Acked-by: Randy Dunlap <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

kernel/locking/rwsem.c

···
 }
 
 /*
- * The rwsem_spin_on_owner() function returns the folowing 4 values
+ * The rwsem_spin_on_owner() function returns the following 4 values
  * depending on the lock owner state.
  *   OWNER_NULL  : owner is currently NULL
  *   OWNER_WRITER: when owner changes and is a writer