add I2C configs

Author: martinayotte

arch/arm64/configs/sun50iw1p1smp_linux_defconfig

@@ -355,7 +355,12 @@ CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
 CONFIG_PPDEV=m
 # CONFIG_HW_RANDOM is not set
 # CONFIG_SUNXI_DMA_TEST is not set
+CONFIG_I2C=y
 CONFIG_I2C_SUNXI=y
+CONFIG_I2C_BOARDINFO=y
+CONFIG_I2C_COMPAT=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_MUX=y
 CONFIG_SPI=y
 CONFIG_SPI_SUNXI=y
 # CONFIG_PINCTRL_SUNXI_TEST is not set