x86, mrst: Check platform_device_register() return code

platform_device_register() may fail, if so propagate the return
code from mrst_device_create().

Signed-off-by: Vasiliy Kulikov <[e-mail]>
LKML-Reference: <[e-mail]>
Acked-by: Alan Cox <[e-mail]>
Signed-off-by: H. Peter Anvin <[e-mail]>

arch/x86/platform/mrst/vrtc.c

···
 	vrtc_resources[1].start = sfi_mrtc_array[0].irq;
 	vrtc_resources[1].end = sfi_mrtc_array[0].irq;
 
-	platform_device_register(&vrtc_device);
-	return 0;
+	return platform_device_register(&vrtc_device);
 }
 
 module_init(mrst_device_create);