sunxi: Add support for the I2C controller which is part of the PRCM

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>
[hdegoede@redhat.com: Minor cleanups]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

applied with fixing 2 checkpatch warnings:
WARNING: please, no space before tabs

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h
index a2a9a38..649f6cd 100644
--- a/arch/arm/include/asm/arch-sunxi/gpio.h
+++ b/arch/arm/include/asm/arch-sunxi/gpio.h
@@ -199,6 +199,8 @@
 #define SUN6I_GPL1_R_P2WI_SDA	3
 
 #define SUN8I_GPL_R_RSB		2
+#define SUN8I_H3_GPL_R_TWI	2
+#define SUN8I_A23_GPL_R_TWI	3
 #define SUN8I_GPL_R_UART	2
 
 #define SUN9I_GPN_R_RSB		3