regulatory: remove redundant isalpha() check

toupper() only modifies lower-case letters, so
the isalpha() check is redundant; remove it.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/reg.c

@@ -1614,9 +1614,7 @@ static void reg_todo(struct work_struct *work)
 
 static void queue_regulatory_request(struct regulatory_request *request)
 {
-	if (isalpha(request->alpha2[0]))
 	request->alpha2[0] = toupper(request->alpha2[0]);
-	if (isalpha(request->alpha2[1]))
 	request->alpha2[1] = toupper(request->alpha2[1]);
 
 	spin_lock(&reg_requests_lock);