mediatek: mt8183: add MTK SPM driver

Add MTK SPM driver for suspend/resume scenario.

Change-Id: I8207eea95914da9e63c62f3afc8329f3ccd9a22c
diff --git a/plat/mediatek/mt8183/plat_debug.c b/plat/mediatek/mt8183/plat_debug.c
index 51816db..2f0b67d 100644
--- a/plat/mediatek/mt8183/plat_debug.c
+++ b/plat/mediatek/mt8183/plat_debug.c
@@ -9,6 +9,7 @@
 #include <lib/mmio.h>
 #include <plat_debug.h>
 #include <platform_def.h>
+#include <spm.h>
 
 void circular_buffer_setup(void)
 {