drm/i915/gsc: add slow_firmware flag to the gsc device definition

Add slow_firmware flag to the gsc device definition
and pass it to mei auxiliary device, this instructs
the driver to use longer operation timeouts.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220907215113.1596567-5-tomas.winkler@intel.comSigned-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

drivers/gpu/drm/i915/gt/intel_gsc.c

@@ -41,6 +41,7 @@ struct gsc_def {
 	unsigned long bar;
 	size_t bar_size;
 	bool use_polling;
+	bool slow_firmware;
 };
 
 /* gsc resources and definitions (HECI1 and HECI2) */
@@ -145,6 +146,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
 	adev->bar.end = adev->bar.start + def->bar_size - 1;
 	adev->bar.flags = IORESOURCE_MEM;
 	adev->bar.desc = IORES_DESC_NONE;
+	adev->slow_firmware = def->slow_firmware;
 
 	aux_dev = &adev->aux_dev;
 	aux_dev->name = def->name;