Platform: samsung_laptop: add support for X520 machines.

my samsung laptop would be very happy if you add
these lines to the file drivers/platform/x86/samsung-laptop.c

Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

drivers/platform/x86/samsung-laptop.c

@@ -770,6 +770,15 @@ static struct dmi_system_id __initdata samsung_dmi_table[] = {
 			DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"),
 		},
 		.callback = dmi_check_cb,
+	},
+		{
+		.ident = "X520",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "X520"),
+			DMI_MATCH(DMI_BOARD_NAME, "X520"),
+		},
+		.callback = dmi_check_cb,
 	},
 	{ },
 };