ARM: dts: ux500: Drop unused i2c power domain supply
This regulator supply is replaced by the proper power
domain.
Reported-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220701225339.814962-1-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>