sh: se7206: Handle non-SuperIO I/O ports.

This fixes up the port calculation logic for non-SuperIO accesses,
before these were always matching the MRSHPC base, now just make
sure the original port is handed back if it's not in the I/O port
range.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/boards/se/7206/io.c

@@ -30,6 +30,8 @@ port2adr(unsigned int port)
 		return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
 	else if (port >= 0x300 && port < 0x310)
 		return (volatile __u16 *) (PA_SMSC + (port - 0x300));
+
+	return (volatile __u16 *)port;
 }
 
 unsigned char se7206_inb(unsigned long port)