Squashed commit of the following:
s32k1xx/s32k146evb/scripts/flash.ld: Update the linker script for the S32K146.
boards/: Hook the S32K146EVB into the configuration and build system.
s32k146_clockconfig.c: Add S32K146 clock configuration.
boards/arm/s32k1xx/s32k146evb/src/s32k146_periphclocks.c: Update peripheral clocking for the S32K146.
arm/s32k1xx/s32k146evb: Initial support fo S32K146EVB. Starting point is just the S32K118EVB with name changes.
