ARM: shmobile: bockw: fixup FPGA ioremap area

Don't keep FPGA ioremap area.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/board-bockw-reference.c

@@ -40,7 +40,7 @@ static const struct pinctrl_map bockw_pinctrl_map[] = {
 #define COMCTLR	0x101c
 static void __init bockw_init(void)
 {
-	static void __iomem *fpga;
+	void __iomem *fpga;
 
 	r8a7778_clock_init();
 	r8a7778_init_irq_extpin_dt(1);
@@ -62,6 +62,8 @@ static void __init bockw_init(void)
 		u16 val = ioread16(fpga + IRQ0MR);
 		val &= ~(1 << 4); /* enable SMSC911x */
 		iowrite16(val, fpga + IRQ0MR);
+
+		iounmap(fpga);
 	}
 
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);