media: m88rs2000: add caps FE_CAN_INVERSION_AUTO

commit 3c8023a782964c72574ad8268ba0ea4e2d9772fc upstream.

The m88rs2000 frontend is always auto inversion.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>