arm/at91: fix build of stamp9g20

Fixes build:

arch/arm/mach-at91/board-stamp9g20.c:126: error: expected '}' before ';' token
Signed-off-by: NOlof Johansson <olof@lixom.net>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/mach-at91/board-stamp9g20.c

@@ -123,8 +123,8 @@ static void __init add_device_nand(void)
 static struct mci_platform_data __initdata mmc_data = {
 	.slot[0] = {
 		.bus_width	= 4,
-		.detect_pin	= -1;
-		.wp_pin		= -1;
+		.detect_pin	= -1,
+		.wp_pin		= -1,
 	},
 };
 #else