kernel: USERSPACE implies HW_STACK_PROTECTION
kernel: USERSPACE implies HW_STACK_PROTECTION

Userspace is built on top of hardware stack protection and assumes
it is there. We can't enable this unless ARCH_HAS_USERSPACE is defined
anyway.

Signed-off-by: Andrew Boie <aab045b28152628be6af0e556050d0381fd0a34d@intel.com>

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