[media] s5p-fimc: Remove reference to outdated macro

The Kconfig symbol S5P_SETUP_MIPIPHY was removed in v3.13. Remove a
reference to its macro from a list of Kconfig options.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>