ACPI: dock: remove global 'dock_device_name'

We only use it in one spot, so it probably gets optimized out, but there's
still no need to use a global variable for this.
Signed-off-by: Alex Chiang <achiang@hp.com>
Acked-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/dock.c

@@ -50,7 +50,6 @@ MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to "
 	" before undocking");
 
 static struct atomic_notifier_head dock_notifier_list;
-static char dock_device_name[] = "dock";
 
 static const struct acpi_device_id dock_device_ids[] = {
 	{"LNXDOCK", 0},
@@ -964,7 +963,7 @@ static int dock_add(acpi_handle handle)
 
 	/* initialize platform device stuff */
 	dock_station->dock_device =
-		platform_device_register_simple(dock_device_name,
+		platform_device_register_simple("dock",
 			dock_station_count, NULL, 0);
 	dock_device = dock_station->dock_device;
 	if (IS_ERR(dock_device)) {