sunxi: Add support for UART0 in PB pin group on A83T

On A83T, PB9,PB10 are UART0 pins.
On allwinner A83T Dev board(h8homlet), this uart0 serial connector
is exposed.

Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
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 7af5e29..a2a9a38 100644
--- a/arch/arm/include/asm/arch-sunxi/gpio.h
+++ b/arch/arm/include/asm/arch-sunxi/gpio.h
@@ -158,6 +158,7 @@
 #define SUN5I_GPB_UART0		2
 #define SUN8I_GPB_UART2		2
 #define SUN8I_A33_GPB_UART0	3
+#define SUN8I_A83T_GPB_UART0	2
 
 #define SUNXI_GPC_NAND		2
 #define SUNXI_GPC_SDC2		3