soc: mediatek: Fix SCPSYS compilation

SCPSYS driver misses the module.h include which makes it fail
when compiling with allmodconf.

This patch fixes this.
Signed-off-by: NMatthias Brugger <matthias.bgg@gmail.com>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NOlof Johansson <olof@lixom.net>

drivers/soc/mediatek/mtk-scpsys.c

@@ -15,6 +15,7 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/mfd/syscon.h>
+#include <linux/module.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>