drm/xe: Prefer USEC_PER_SEC over MICRO

It will be easier to understand the meaning of the flr_timeout
value if the USEC_PER_SEC macro is used in the expression.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250311140115.2042-1-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/xe_device.c

@@ -514,7 +514,7 @@ static bool xe_driver_flr_disabled(struct xe_device *xe)
  */
 static void __xe_driver_flr(struct xe_device *xe)
 {
-	const unsigned int flr_timeout = 3 * MICRO; /* specs recommend a 3s wait */
+	const unsigned int flr_timeout = 3 * USEC_PER_SEC; /* specs recommend a 3s wait */
 	struct xe_mmio *mmio = xe_root_tile_mmio(xe);
 	int ret;