soc: arm: nuvoton_npcx: s/SOC_POWER_MANAGEMENT_TRACE/NPCX_PM_TRACE

Rename CONFIG_SOC_POWER_MANAGEMENT_TRACE to CONFIG_NPCX_PM_TRACE so that
it is clear that it's a NPCX specific option.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>