V4L/DVB (12554): FM TX: si4713: Add document file
V4L/DVB (12554): FM TX: si4713: Add document file

This patch adds a document file for si4713 device driver.
It describes the driver interfaces and organization.

Signed-off-by: Eduardo Valentin <977df7d8e3020f3c4acf757f6ad9c6cf2bc8f2d7@nokia.com>
Signed-off-by: Hans Verkuil <f625be9dbdcbbd12a043857af148e8fb895d9a1d@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@redhat.com>

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