feat(intel): add intel_rsu_update() to sip_svc_v2

Add smc function id for intel_rsu_update() in sip_svc_v2. For temporarily
saving the RSU application image address before a cold reset is
issued.

Signed-off-by: Mahesh Rao <mahesh.rao@intel.com>
Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
Change-Id: I43bc7bd5aa5fa9238bceba1d826bf0a34ff87adb
diff --git a/plat/intel/soc/common/socfpga_sip_svc_v2.c b/plat/intel/soc/common/socfpga_sip_svc_v2.c
index 791c714..e9996d3 100644
--- a/plat/intel/soc/common/socfpga_sip_svc_v2.c
+++ b/plat/intel/soc/common/socfpga_sip_svc_v2.c
@@ -158,6 +158,10 @@
 		status = intel_hps_set_bridges(x2, x3);
 		SMC_RET2(handle, status, x1);
 
+	case INTEL_SIP_SMC_V2_RSU_UPDATE_ADDR:
+		status = intel_rsu_update(x2);
+		SMC_RET2(handle, status, x1);
+
 	case INTEL_SIP_SMC_V2_MAILBOX_SEND_COMMAND:
 		status = intel_v2_mbox_send_cmd(x1, (uint32_t *)x2, x3);
 		SMC_RET2(handle, status, x1);