dts/nxp: Fix dtc v1.4.6 warning: Node has a unit name, but no reg prop
dts/nxp: Fix dtc v1.4.6 warning: Node has a unit name, but no reg prop

Adds #address-cells, #size-cells, and reg properties to cpus on the
lpc54xxx soc.

Signed-off-by: Maureen Helm <87a696db5547fa477bda9f9e0f00013c839c14d3@nxp.com>

zephyriot/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,mbolivar/zephyr,kraj/zephyr,kraj/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,nashif/zephyr,kraj/zephyr,Vudentz/zephyr,galak/zephyr,zephyriot/zephyr,ldts/zephyr,zephyriot/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyriot/zephyr,mbolivar/zephyr,explora26/zephyr,explora26/zephyr,Vudentz/zephyr,galak/zephyr,punitvara/zephyr,galak/zephyr,nashif/zephyr,zephyriot/zephyr,explora26/zephyr,finikorg/zephyr,mbolivar/zephyr,finikorg/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,ldts/zephyr,nashif/zephyr,finikorg/zephyr,ldts/zephyr,explora26/zephyr,galak/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,kraj/zephyr,punitvara/zephyr,explora26/zephyr,finikorg/zephyr,mbolivar/zephyr,Vudentz/zephyr,mbolivar/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,punitvara/zephyr,Vudentz/zephyr