[media] v4l: rcar_fdp1: add FCP dependency

Commit 4710b752 ("[media] v4l: Add Renesas R-Car FDP1 Driver") in the
v4l-dvb tree adds CONFIG_VIDEO_RENESAS_FDP1.

It calls into the FCP driver, but when there is no dependency, FCP might
be a module while FDP1 is built-in.

We have the same logic in VIDEO_RENESAS_VSP1, which also depends on
FCP not being a module when it is built-in itself.

drivers/media/platform/rcar_fdp1.o: In function `fdp1_pm_runtime_resume':
rcar_fdp1.c:(.text.fdp1_pm_runtime_resume+0x78): undefined reference to `rcar_fcp_enable'
drivers/media/platform/rcar_fdp1.o: In function `fdp1_pm_runtime_suspend':
rcar_fdp1.c:(.text.fdp1_pm_runtime_suspend+0x14): undefined reference to `rcar_fcp_disable'
drivers/media/platform/rcar_fdp1.o: In function `fdp1_probe':
rcar_fdp1.c:(.text.fdp1_probe+0x15c): undefined reference to `rcar_fcp_get'

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>