uboot-phytec

arm: dts: k3-am654-r5-base-board: add supply rail for MPU

MPU voltage on AM65x-evm is controlled via the TPS62363 chip attached
to i2c0 bus. Add device node for this so that it can be controlled via
a regulator driver.

Signed-off-by: Tero Kristo <t-kristo@ti.com>