P2P: Avoid integer overflow in channel

For some 6 GHz operating class like 134, there is a possibility where
the ch variable used for channel iterator overflows when it is
incremented. Fix this by updating the datatype of ch variable to
avoid integer overflow while incrementing.

Signed-off-by: Sreeramya Soratkal <ssramya@codeaurora.org>

wpa_supplicant/p2p_supplicant.c

@@ -3818,7 +3818,7 @@ static int wpas_p2p_setup_channels(struct wpa_supplicant *wpa_s,
 
 	for (op = 0; global_op_class[op].op_class; op++) {
 		const struct oper_class_map *o = &global_op_class[op];
-		u8 ch;
+		unsigned int ch;
 		struct p2p_reg_class *reg = NULL, *cli_reg = NULL;
 
 		if (o->p2p == NO_P2P_SUPP ||