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/configs/orangepi_pc_defconfig b/configs/orangepi_pc_defconfig
index 358caa5..ea9ed87 100644
--- a/configs/orangepi_pc_defconfig
+++ b/configs/orangepi_pc_defconfig
@@ -12,3 +12,4 @@
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_FPGA is not set
 CONFIG_CMD_GPIO=y
+CONFIG_R_I2C_ENABLE=y