PCMCIA/i82092: include <linux/io.h> instead of <asm/io.h>

Include the more general linux/io.h instead of asm/io.h
as checkpatch suggests.

Co-developed-by: Lukas Panzer <lukas.panzer@fau.de>
Signed-off-by: Lukas Panzer <lukas.panzer@fau.de>
Signed-off-by: Simon Geis <simon.geis@fau.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>