misc/mei: gsc_proxy: add dependency on Xe driver

misc/mei: gsc_proxy: add dependency on Xe driver

This driver is useful if at least one DRM driver registers an auxiliary device
for the ME interface. With the addition of Xe, this is no longer just i915.

Cc: Usyskin, Alexander <alexander.usyskin@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Simon Richter <Simon.Richter@hogyros.de>
Link: https://patch.msgid.link/20260107182615.488194-5-Simon.Richter@hogyros.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>