media: cec: Kconfig coding style issue

Use tabs instead of spaces and help is two-spaced after single tab.

The incorrect spacing breaks menuconfig on older kernels.
Signed-off-by: NBrad Love <brad@nextdimension.cc>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>