Input: aiptek - use descriptors of current altsetting

Make sure to always use the descriptors of the current alternate setting
to avoid future issues when accessing fields that may differ between
settings.

Signed-off-by: Johan Hovold <[e-mail]>
Acked-by: Vladis Dronov <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/tablet/aiptek.c

···
 
 	aiptek->inputdev = inputdev;
 	aiptek->intf = intf;
-	aiptek->ifnum = intf->altsetting[0].desc.bInterfaceNumber;
+	aiptek->ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
 	aiptek->inDelay = 0;
 	aiptek->endDelay = 0;
 	aiptek->previousJitterable = 0;