V4L/DVB: xc5000, rework xc_write_reg
V4L/DVB: xc5000, rework xc_write_reg

Rework xc_write_reg function for correct read register of the xc5000.
It is very useful for tm6000.

Tested for tm6000 and for saa7134 works well.

Signed-off-by: Beholder Intl. Ltd. Dmitry Belimov <2b3362bfaf7a874facb4c6df319888e1dbcf1561@gmail.com>
Acked-by: Devin Heitmueller <039f3b3c9b432027eb8868e4a734444e1ca005b6@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@redhat.com>

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