arch: arm: Do not enable SW_VECTOR_RELAY with M0+ and VTOR
arch: arm: Do not enable SW_VECTOR_RELAY with M0+ and VTOR

Whenever a Cortex-M0+ supports the VTOR register it makes no sense to
use the software vector relay mechanism. Therefore change the logic so
that SW_VECTOR_RELAY does not get enabled whenever a VTOR register is
present, but enable it if an M0+ has no VTOR.

Signed-off-by: Carles Cufi <853081dc8dca4fe6a7e3c984752718b5db36e060@nordicsemi.no>

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