srcu: Fix typo s/srcu_check_read_flavor()/__srcu_check_read_flavor()/

This commit fixes a typo in which a comment needed to have been updated
from srcu_check_read_flavor() to __srcu_check_read_flavor().

Reported-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Closes: https://lore.kernel.org/all/b75d1fcd-6fcd-4619-bb5c-507fa599ee28@amd.com/
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>

include/linux/srcutree.h

@@ -258,7 +258,7 @@ static inline void srcu_check_read_flavor_lite(struct srcu_struct *ssp)
 	if (likely(READ_ONCE(sdp->srcu_reader_flavor) & SRCU_READ_FLAVOR_LITE))
 		return;
 
-	// Note that the cmpxchg() in srcu_check_read_flavor() is fully ordered.
+	// Note that the cmpxchg() in __srcu_check_read_flavor() is fully ordered.
 	__srcu_check_read_flavor(ssp, SRCU_READ_FLAVOR_LITE);
 }