ARM: dts: bcm2711-cm4s Correct i2c0mux to use 0/1 and 28/29 & 2 regulators

CM4S follows CM1/3, so based on the documentation cameras/displays
connect to 0/1 and 28/29, not 0/1 and 44/45.

Likewise the camera regulator controls are independent as on CM1/3.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>