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/i2c.h b/arch/arm/include/asm/arch-sunxi/i2c.h
index 561cd2b..4dfd313 100644
--- a/arch/arm/include/asm/arch-sunxi/i2c.h
+++ b/arch/arm/include/asm/arch-sunxi/i2c.h
@@ -23,6 +23,9 @@
 #ifdef CONFIG_I2C4_ENABLE
 #define CONFIG_I2C_MVTWSI_BASE4	SUNXI_TWI4_BASE
 #endif
+#ifdef CONFIG_R_I2C_ENABLE
+#define CONFIG_I2C_MVTWSI_BASE5 SUNXI_R_TWI_BASE
+#endif
 
 /* This is abp0-clk on sun4i/5i/7i / abp1-clk on sun6i/sun8i which is 24MHz */
 #define CONFIG_SYS_TCLK		24000000