drm/xe/xe_sysctrl: Make sysctrl flood limit reusable

The sysctrl command flood limit was defined in an event specific header,
restricting its usage to event handling. Move it to the shared header
with a generic name so it can be re-used across all files using system
controller commands.

Reviewed-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Mallesh Koujalagi <mallesh.koujalagi@intel.com>
Link: https://patch.msgid.link/20260713074755.1278607-7-riana.tauro@intel.com
Signed-off-by: Riana Tauro <riana.tauro@intel.com>

drivers/gpu/drm/xe/xe_sysctrl_event.c

@@ -16,7 +16,7 @@ static void get_pending_event(struct xe_sysctrl *sc, struct xe_sysctrl_mailbox_c
 {
 	struct xe_sysctrl_event_response *response = command->data_out;
 	struct xe_device *xe = sc_to_xe(sc);
-	u32 count = XE_SYSCTRL_EVENT_FLOOD;
+	u32 count = XE_SYSCTRL_FLOOD_LIMIT;
 	size_t len;
 	int ret;
 

drivers/gpu/drm/xe/xe_sysctrl_event_types.h

@@ -10,9 +10,6 @@
 
 #define XE_SYSCTRL_EVENT_DATA_LEN		59
 
-/* Modify as needed */
-#define XE_SYSCTRL_EVENT_FLOOD			16
-
 /**
  * enum xe_sysctrl_event - Events reported by System Controller
  *

drivers/gpu/drm/xe/xe_sysctrl_mailbox_types.h

@@ -52,6 +52,9 @@ struct xe_sysctrl_mailbox_command {
 	size_t data_out_len;
 };
 
+/* Modify as needed */
+#define XE_SYSCTRL_FLOOD_LIMIT		16
+
 #define XE_SYSCTRL_MB_FRAME_SIZE	16
 #define XE_SYSCTRL_MB_MAX_FRAMES	64
 #define XE_SYSCTRL_MB_MAX_MESSAGE_SIZE	\