[ARM] pxa: fix missing of __REG() definition for ac97 registers access
[ARM] pxa: fix missing of __REG() definition for ac97 registers access

This currently happens for 'drivers/input/touch/mainstone-wm97xx.c'.

Signed-off-by: Eric Miao <e9e0335ae43eee51396737d09983d9b25d00e51e@marvell.com>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs