sunxi: Add support for UART0 in PB pin group on A33

The A33 adds a pinmux function for UART0 in the PB pin group.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h
index 496295d..8e67b3b 100644
--- a/arch/arm/include/asm/arch-sunxi/gpio.h
+++ b/arch/arm/include/asm/arch-sunxi/gpio.h
@@ -156,6 +156,7 @@
 #define SUN4I_GPB_UART0		2
 #define SUN5I_GPB_UART0		2
 #define SUN8I_GPB_UART2		2
+#define SUN8I_A33_GPB_UART0	3
 
 #define SUNXI_GPC_SDC2		3
 #define SUN6I_GPC_SDC3		4