rtc: msc313: fix missing include

The driver needs io.h

Reported-by: Stephen Rothwell <[e-mail]>
Signed-off-by: Alexandre Belloni <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/rtc/rtc-msc313.c

···
 
 #include <linux/clk.h>
 #include <linux/delay.h>
+#include <linux/io.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>