drm/xe: Fix check for platform without geometry pipeline

It's not possible for the condition checking if we're running on
platform without geometry pipeline to ever be true, since
gt->fuse_topo.g_dss_mask is an array.

It also breaks the build:
../drivers/gpu/drm/xe/xe_rtp.c:183:50: error: address of array 'gt->fuse_topo.g_dss_mask' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion]

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20230523135020.345596-2-michal@hardline.pl


Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>