ARM: mvebu: x530: set MPP55 to gpio

MPP55 is used as a reset connected to the L3 switch chip. This doesn't
matter for u-boot as it doesn't use the L3 switch but it is useful to
be able to toggle the switch in/out of reset for the OS.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/board/alliedtelesis/x530/x530.c b/board/alliedtelesis/x530/x530.c
index c0ec2af..cbf4533 100644
--- a/board/alliedtelesis/x530/x530.c
+++ b/board/alliedtelesis/x530/x530.c
@@ -93,7 +93,7 @@
 	writel(0x55550550, MVEBU_MPP_BASE + 0x0c);
 	writel(0x55555555, MVEBU_MPP_BASE + 0x10);
 	writel(0x00100565, MVEBU_MPP_BASE + 0x14);
-	writel(0x40000000, MVEBU_MPP_BASE + 0x18);
+	writel(0x00000000, MVEBU_MPP_BASE + 0x18);
 	writel(0x00004444, MVEBU_MPP_BASE + 0x1c);
 
 	return 0;