drm/i915: Skip Bit12 fw domain reset for gen12+

Bit12 of the Forcewake request register should not be cleared post
gen12. Do not touch this bit while clearing during fw domain reset.

v2: Tweak the comment to drop older platforms(MattR)

Bspec: 52542
Signed-off-by: Sushma Venkatesh Reddy <sushma.venkatesh.reddy@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220817224304.255767-1-radhakrishna.sripada@intel.com

drivers/gpu/drm/i915/intel_uncore.c

@@ -112,7 +112,10 @@ fw_domain_reset(const struct intel_uncore_forcewake_domain *d)
 	 * trying to reset here does exist at this point (engines could be fused
 	 * off in ICL+), so no waiting for acks
 	 */
-	/* WaRsClearFWBitsAtReset:bdw,skl */
+	/* WaRsClearFWBitsAtReset */
+	if (GRAPHICS_VER(d->uncore->i915) >= 12)
+		fw_clear(d, 0xefff);
+	else
 		fw_clear(d, 0xffff);
 }