kconfig: Have the 'SMP' option depend on 'USE_SWITCH'

SMP requires the new-style '_arch_switch' to be enabled. To prevent
users from creating invalid configurations where SMP is enabled while
_arch_switch is not, we add a dependency from SMP to USE_SWITCH.

Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
1 file changed