refact(twdog): move trusted wdog API to spm_common

Other tests cases need same API to enable/disable twdog,
so we need to move them to common place.

Signed-off-by: Nabil Kahlouche <nabil.kahlouche@arm.com>
Change-Id: Ie54cfdf44777000dda924bb1239b77182a3dced9
diff --git a/include/runtime_services/spm_common.h b/include/runtime_services/spm_common.h
index de5c254..6fe445a 100644
--- a/include/runtime_services/spm_common.h
+++ b/include/runtime_services/spm_common.h
@@ -154,5 +154,7 @@
 			const struct ffa_uuid uuid,
 			const struct ffa_partition_info *expected,
 			const uint16_t expected_size);
+bool enable_trusted_wdog_interrupt(ffa_id_t source, ffa_id_t dest);
+bool disable_trusted_wdog_interrupt(ffa_id_t source, ffa_id_t dest);
 
 #endif /* SPM_COMMON_H */