[ALSA] ac97: Fix volume control bit size detection for STAC9704.
[ALSA] ac97: Fix volume control bit size detection for STAC9704.

AC97 Codec

Signed-off-by: James Courtier-Dutton <ef547badb8b0801d06a93155cc052341c749d1c0@superbug.co.uk>

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