intel: Update RSU driver return code

Modify RSU driver error code for backward-compatibility with
Linux RSU driver

Signed-off-by: Abdul Halim, Muhammad Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: Ib9e38d4017efe35d3aceeee27dce451fbd429fb5

plat/intel/soc/common/include/socfpga_sip_svc.h

@@ -10,9 +10,11 @@
 
 /* SiP status response */
 #define INTEL_SIP_SMC_STATUS_OK				0
-#define INTEL_SIP_SMC_STATUS_ERROR			0x4
 #define INTEL_SIP_SMC_STATUS_BUSY			0x1
 #define INTEL_SIP_SMC_STATUS_REJECTED			0x2
+#define INTEL_SIP_SMC_STATUS_ERROR			0x4
+#define INTEL_SIP_SMC_RSU_ERROR				0x7
+
 
 /* SMC SiP service function identifier */
 #define INTEL_SIP_SMC_FPGA_CONFIG_START			0xC2000001

plat/intel/soc/common/socfpga_sip_svc.c

@@ -374,7 +374,7 @@ uint64_t intel_rsu_update_address;
 static uint32_t intel_rsu_status(uint64_t *respbuf, uint32_t respbuf_sz)
 {
 	if (mailbox_rsu_status((uint32_t *)respbuf, respbuf_sz) < 0)
-		return INTEL_SIP_SMC_STATUS_ERROR;
+		return INTEL_SIP_SMC_RSU_ERROR;
 
 	return INTEL_SIP_SMC_STATUS_OK;
 }
@@ -388,7 +388,7 @@ static uint32_t intel_rsu_update(uint64_t update_address)
 static uint32_t intel_rsu_notify(uint64_t execution_stage)
 {
 	if (mailbox_hps_stage_notify(execution_stage) < 0)
-		return INTEL_SIP_SMC_STATUS_ERROR;
+		return INTEL_SIP_SMC_RSU_ERROR;
 
 	return INTEL_SIP_SMC_STATUS_OK;
 }
@@ -397,7 +397,7 @@ static uint32_t intel_rsu_retry_counter(uint32_t *respbuf, uint32_t respbuf_sz,
 					uint32_t *ret_stat)
 {
 	if (mailbox_rsu_status((uint32_t *)respbuf, respbuf_sz) < 0)
-		return INTEL_SIP_SMC_STATUS_ERROR;
+		return INTEL_SIP_SMC_RSU_ERROR;
 
 	*ret_stat = respbuf[8];
 	return INTEL_SIP_SMC_STATUS_OK;