ARM: ux500: drop any 0x prefix from I2C DT devices

This removes the "0x" prefix in front of the I2C DT device
address designation for each I2C DT node in the ux500
devicetree files.

Reported-by: Bryan Wu <cooloney@gmail.com>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>