In a multi-GT system we need to initialize MMIO access for each GT, not
just the primary GT.

Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: NMatt Roper <matthew.d.roper@intel.com>
Reviewed-by: NDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220906234934.3655440-9-matthew.d.roper@intel.comSigned-off-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>