soc: esp32: include ksched.h in esp32-mp.c

esp32-mp.c calls z_sched_ipi() so it needs to include ksched.h,
as it is no longer included via kernel.h after removal of
kernel/internal/smp.h.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>

Author: dcpleung

soc/espressif/esp32/esp32-mp.c

@@ -22,6 +22,7 @@
 #ifdef CONFIG_SMP
 
 #include <ipi.h>
+#include <ksched.h>
 
 #ifndef CONFIG_SOC_ESP32_PROCPU
 static struct k_spinlock loglock;