V4L/DVB (3529): Kconfig: add menu items for cs53l32a and wm8775 A/D converters

- created Kconfig item, VIDEO_CS53L32A, for the cs53l32a module which supports
  the Cirrus Logic CS53L32A Low Voltage Stereo A/D Converter.
- created Kconfig item, VIDEO_WM8775, for the wm8775 module which supports
  the Wolfson Microelectronics WM8775 high performance stereo A/D Converter.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>