ARM: dt: sunxi: Remove i2c controller clock-frequency that matches default

The clock-frequency values of the i2c controller nodes match the
defaults of the driver. Remove the properties to use the defaults,
and be consistent with sun8i.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --cc arch/arm/boot/dts/sun4i-a10.dtsi
Simple merge

diff --cc arch/arm/boot/dts/sun5i-a10s.dtsi
Simple merge

diff --cc arch/arm/boot/dts/sun5i-a13.dtsi
Simple merge

diff --cc arch/arm/boot/dts/sun6i-a31.dtsi
Simple merge

diff --cc arch/arm/boot/dts/sun7i-a20.dtsi
Simple merge