ARM: dts: dra7-evm: Fix i2c3 pinmux and frequency
ARM: dts: dra7-evm: Fix i2c3 pinmux and frequency

The I2C3 pins are taken from pads E21 (GPIO6_14) and
F20 (GPIO6_15). Use the right pinmux register and mode.

Also set the I2C3 bus frequency to a safer 400KHz than
3.4Mhz.

CC: Peter Ujfalusi <e5c0b4cdf99ae1d408b9c497159e74b54e02e008@ti.com>
Signed-off-by: Roger Quadros <eba86029bdfc5762d0419aa8dd4fd0368b2d01d4@ti.com>
Signed-off-by: Tony Lindgren <1001e8702733cced254345e193c88aaa47a4f5de@atomide.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs