ARM: dts: bcm283x: Fix pin function of JTAG pins

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

Fixes: 21ff8439 ("ARM: dts: bcm283x: Define standard pinctrl groups in the gpio node.")
Signed-off-by: Henry Zhang <henryzhang62@gmail.com>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

arch/arm/boot/dts/bcm283x.dtsi

@@ -252,7 +252,7 @@ i2c_slave_gpio18: i2c_slave_gpio18 {
 
 			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>;