drm/xe: Wait for success on guc done.

Rather than a constant check on proto and wait not busy,
let's wait for the expected success and then check the
protocol afterwards.

With this, we can now use the regular xe_mmio_wait32
and kill this local need for the wait_for.
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>

drivers/gpu/drm/xe/xe_guc.c

@@ -22,13 +22,6 @@
 #include "i915_reg_defs.h"
 #include "gt/intel_gt_regs.h"
 
-#include <linux/delay.h>
-/*
- * FIXME: This header has been deemed evil and we need to kill it. Temporarily
- * including so we can use 'wait_for'.
- */
-#include "i915_utils.h"
-
 /* TODO: move to common file */
 #define GUC_PVC_MOCS_INDEX_MASK		REG_GENMASK(25, 24)
 #define PVC_MOCS_UC_INDEX		1
@@ -688,19 +681,17 @@ int xe_guc_send_mmio(struct xe_guc *guc, const u32 *request, u32 len)
 	header = xe_mmio_read32(gt, reply_reg);
 	if (FIELD_GET(GUC_HXG_MSG_0_TYPE, header) ==
 	    GUC_HXG_TYPE_NO_RESPONSE_BUSY) {
-#define done ({ header = xe_mmio_read32(gt, reply_reg); \
-		FIELD_GET(GUC_HXG_MSG_0_ORIGIN, header) != \
-		GUC_HXG_ORIGIN_GUC || \
-		FIELD_GET(GUC_HXG_MSG_0_TYPE, header) != \
-		GUC_HXG_TYPE_NO_RESPONSE_BUSY; })
 
-		ret = wait_for(done, 1000);
-		if (unlikely(ret))
-			goto timeout;
+		ret = xe_mmio_wait32(gt, reply_reg,
+				     FIELD_PREP(GUC_HXG_MSG_0_TYPE,
+						GUC_HXG_TYPE_RESPONSE_SUCCESS),
+				     GUC_HXG_MSG_0_TYPE, 1000, &header);
+
 		if (unlikely(FIELD_GET(GUC_HXG_MSG_0_ORIGIN, header) !=
-				       GUC_HXG_ORIGIN_GUC))
+			     GUC_HXG_ORIGIN_GUC))
 			goto proto;
-#undef done
+		if (unlikely(ret))
+			goto timeout;
 	}
 
 	if (FIELD_GET(GUC_HXG_MSG_0_TYPE, header) ==