sunxi SPL: Initialize timer early so usleep() can be used
sunxi: sunxi_i2c_init function to enable a given i2c bus
arm i2c mvtwsi: Adapt mvtwsi to support Allwinner i2c controller

The i2c controller found in Allwinner sunxi series of SoCs is almost
identical to the Marvell Orion controller. Most likely the two share
the same origin. This adds the little glue needed for making mvtwsi
driver work with the I2C controller in Allwinner SoCs.
sunxi: Enable mvtwsi driver instead of sunxi_i2c
i2c: Remove sunxi_i2c driver. Functionality merged into mvtwsi driver.