accel/amdxdna: Declare force_cmdlist as static

Fix sparse warning:
  symbol 'force_cmdlist' was not declared. Should it be static?

Fixes: aac2430 ("accel/amdxdna: Add command execution")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202412311448.GKQj7uPZ-lkp@intel.com/
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250102212244.1586340-5-lizhi.hou@amd.com

Author: houlz0507

drivers/accel/amdxdna/aie2_ctx.c

@@ -22,7 +22,7 @@
 #include "amdxdna_mailbox.h"
 #include "amdxdna_pci_drv.h"
 
-bool force_cmdlist;
+static bool force_cmdlist;
 module_param(force_cmdlist, bool, 0600);
 MODULE_PARM_DESC(force_cmdlist, "Force use command list (Default false)");