Remove a pointer check that can never be true

chan is set to the result of pointer arithmetic (pointer to an entry in
an array) that can never be NULL. As such, there is no need to check for
it to be non-NULL before deference. Remove this check to avoid
complaints from static analyzers.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/ap/drv_callbacks.c

@@ -956,8 +956,6 @@ static struct hostapd_channel_data * hostapd_get_mode_channel(
 
 	for (i = 0; i < iface->current_mode->num_channels; i++) {
 		chan = &iface->current_mode->channels[i];
-		if (!chan)
-			return NULL;
 		if ((unsigned int) chan->freq == freq)
 			return chan;
 	}