V4L/DVB (3689): Kconfig: fix VP-3054 Secondary I2C Bus build configuration menu dependencies

This patch fixes a dependency problem that affected the indentation order
within the individual frontend selection support menus for cx88-dvb.
- created a boolean dependency link for VIDEO_CX88_VP3054, so that
  it's tristate value will be the same as that of VIDEO_CX88_DVB.
- VIDEO_CX88_VP3054 is automatically selected by VIDEO_CX88_DVB_ALL_FRONTENDS,
  but is otherwise selected by VIDEO_CX88_DVB_VP3054, offered as an option
  under VIDEO_CX88_DVB_MT352

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