V4L/DVB (10905): dib0700: enable DVB_FE_CUSTOMISE for dibcom frontends

There was never any build-time dependency of the dib0700 usb module on the
dib0070 tuner module. Now that the build-time dependencies of dib0700 on
dib3000mc, dib7000p and dib7000m have been removed in the previous changesets,
we can enable DVB_FE_CUSTOMISE for these modules under config DVB_USB_DIB0700

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