imxrt1050: Disable low-power modes
imxrt1050: Disable low-power modes

The imxrt1050 is configured to use SYSTICK for the kernel timer, but
SYSTICK cannot wake up the soc from low-power modes. Disable low-power
modes on this soc until we have support for an alternative timer.

This fixes k_sleep on the EVKB version of the mimxrt1050_evk board. An
earlier version of the board (EVK, not EVKB), had A0 silicon which
by default did not enter low-power mode on a wfi.

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

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