ARM: dts: microchip: sam9x75_curiosity: Add power monitor support

ARM: dts: microchip: sam9x75_curiosity: Add power monitor support

Add PAC1934 support in order to monitor the board power consumption.
Device is connected on flexcom7 in twi mode.

[root@SAM9X75 ~]$ awk -f pac1934.awk
VDD3V3 current:   10.675 mA, voltage: 3295.41 mV
VDDOUT4 current:  5.7625 mA, voltage: 1196.78 mV
VDDCORE current: 115.442 mA, voltage: 1243.65 mV
VDDIODDR current: 29.585 mA, voltage: 1345.21 mV

Signed-off-by: Mihai Sain <mihai.sain@microchip.com>
Link: https://lore.kernel.org/r/20241122080523.3941-3-mihai.sain@microchip.com
[claudiu.beznea: s/VDDOUT4/DCDC4 to comply with schematics]
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>