soc: esp32: make SCHED_CPU_MASK depend on SCHED_DUMB

Forcing SCHED_CPU_MASK without SCHED_DUMB results in a global warning
from Kconfig.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

Author: nashif

soc/espressif/esp32/Kconfig.defconfig

@@ -27,7 +27,7 @@ config SCHED_IPI_SUPPORTED
 	default y
 
 config SCHED_CPU_MASK
-	default y
+	default y if SCHED_DUMB
 
 config MP_MAX_NUM_CPUS
 	default 2