accel/ivpu: Make selected params read-only

Make disable_mmu_cont_pages and force_snoop params read-only.
It is unsafe to change these params after driver is loaded.
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Reviewed-by: Wachowski, Karol <karol.wachowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240611120433.1012423-8-jacek.lawrynowicz@linux.intel.com

drivers/accel/ivpu/ivpu_drv.c

@@ -58,11 +58,11 @@ module_param_named(sched_mode, ivpu_sched_mode, int, 0444);
 MODULE_PARM_DESC(sched_mode, "Scheduler mode: 0 - Default scheduler, 1 - Force HW scheduler");
 
 bool ivpu_disable_mmu_cont_pages;
-module_param_named(disable_mmu_cont_pages, ivpu_disable_mmu_cont_pages, bool, 0644);
+module_param_named(disable_mmu_cont_pages, ivpu_disable_mmu_cont_pages, bool, 0444);
 MODULE_PARM_DESC(disable_mmu_cont_pages, "Disable MMU contiguous pages optimization");
 
 bool ivpu_force_snoop;
-module_param_named(force_snoop, ivpu_force_snoop, bool, 0644);
+module_param_named(force_snoop, ivpu_force_snoop, bool, 0444);
 MODULE_PARM_DESC(force_snoop, "Force snooping for NPU host memory access");
 
 struct ivpu_file_priv *ivpu_file_priv_get(struct ivpu_file_priv *file_priv)