BCM283x ALT5 function for JTAG pins

BCM2835 ARM Peripherals doc shows gpio pins 4, 5, 6, 12 and 13 carry altenate
function, ALT5 for ARM JTAG

Signed-off-by: Henry Zhang <henryzhang62@yahoo.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/bcm283x.dtsi

@@ -246,7 +246,7 @@
 
 			jtag_gpio4: jtag_gpio4 {
 				brcm,pins = <4 5 6 12 13>;
-				brcm,function = <BCM2835_FSEL_ALT4>;
+				brcm,function = <BCM2835_FSEL_ALT5>;
 			};
 			jtag_gpio22: jtag_gpio22 {
 				brcm,pins = <22 23 24 25 26 27>;