drm/xe: Use platform name in xe_assert()

We can now use more user-friendly platform name instead of
previosly used magic platform enumerator value:

  [ ] xe 0000:00:02.0: [drm] Assertion `false` failed!
      platform: ALDERLAKE_S ...
  [ ] xe 0000:03:00.0: [drm] Assertion `false` failed!
      platform: DG2 ...

vs

  [ ] xe 0000:00:02.0: [drm] Assertion `false` failed!
      platform: 3 ...
  [ ] xe 0000:03:00.0: [drm] Assertion `false` failed!
      platform: 7 ...
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240521142257.756-4-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/xe_assert.h

@@ -109,11 +109,11 @@
 #define xe_assert_msg(xe, condition, msg, arg...) ({						\
 	const struct xe_device *__xe = (xe);							\
 	__xe_assert_msg(__xe, condition,							\
-			"platform: %d subplatform: %d\n"					\
+			"platform: %s subplatform: %d\n"					\
 			"graphics: %s %u.%02u step %s\n"					\
 			"media: %s %u.%02u step %s\n"						\
 			msg,									\
-			__xe->info.platform, __xe->info.subplatform,				\
+			__xe->info.platform_name, __xe->info.subplatform,			\
 			__xe->info.graphics_name,						\
 			__xe->info.graphics_verx100 / 100,					\
 			__xe->info.graphics_verx100 % 100,					\