drm/amdgpu: correct default gfx wdt timeout setting

When gfx wdt was configured to fatal_disable, the
timeout period should be configured to 0x0 (timeout
disabled)
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Dennis Li <Dennis.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -185,7 +185,7 @@ uint amdgpu_ras_mask = 0xffffffff;
 int amdgpu_bad_page_threshold = -1;
 struct amdgpu_watchdog_timer amdgpu_watchdog_timer = {
 	.timeout_fatal_disable = false,
-	.period = 0x23, /* default to max. timeout = 1 << 0x23 cycles */
+	.period = 0x0, /* default to 0x0 (timeout disable) */
 };
 
 /**
@@ -553,7 +553,7 @@ module_param_named(timeout_fatal_disable, amdgpu_watchdog_timer.timeout_fatal_di
  * DOC: timeout_period (uint)
  * Modify the watchdog timeout max_cycles as (1 << period)
  */
-MODULE_PARM_DESC(timeout_period, "watchdog timeout period (1 to 0x23(default), timeout maxCycles = (1 << period)");
+MODULE_PARM_DESC(timeout_period, "watchdog timeout period (0 = timeout disabled, 1 ~ 0x23 = timeout maxcycles = (1 << period)");
 module_param_named(timeout_period, amdgpu_watchdog_timer.period, uint, 0644);
 
 /**