i915/drm/gt: Move the gt defines in the gt directory

Create a new intel_gt_defines.h inside the gt/ directory as a
placeholder for all the generic GT based defines.

As of now place only I915_MAX_GT.
Co-developed-by: Chris Wilson <chris.p.wilson@linux.intel.com>
Signed-off-by: Chris Wilson <chris.p.wilson@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230801141955.383305-3-andi.shyti@linux.intel.com

drivers/gpu/drm/i915/gt/intel_gt_defines.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_GT_DEFINES__
+#define __INTEL_GT_DEFINES__
+
+#define I915_MAX_GT 2
+
+#endif

drivers/gpu/drm/i915/i915_drv.h

@@ -44,6 +44,7 @@
 #include "gem/i915_gem_stolen.h"
 
 #include "gt/intel_engine.h"
+#include "gt/intel_gt_defines.h"
 #include "gt/intel_gt_types.h"
 #include "gt/intel_region_lmem.h"
 #include "gt/intel_workarounds.h"
@@ -313,7 +314,6 @@ struct drm_i915_private {
 	/*
 	 * i915->gt[0] == &i915->gt0
 	 */
-#define I915_MAX_GT 2
 	struct intel_gt *gt[I915_MAX_GT];
 
 	struct kobject *sysfs_gt;