fix(intel): add mailbox error return status for FCS_DECRYPTION

Add 2 more mailbox error return status for FCS_DECRYPTION when sending
mailbox command to SDM

Signed-off-by: Sieu Mun Tang <sieu.mun.tang@intel.com>
Change-Id: Ifff4faa397232cc0080f9fca6f6948ac305915c4
diff --git a/plat/intel/soc/common/include/socfpga_mailbox.h b/plat/intel/soc/common/include/socfpga_mailbox.h
index 3ab6f52..3abf39d 100644
--- a/plat/intel/soc/common/include/socfpga_mailbox.h
+++ b/plat/intel/soc/common/include/socfpga_mailbox.h
@@ -129,6 +129,10 @@
 #define MBOX_BUSY					-5
 #define MBOX_TIMEOUT					-2047
 
+/* Key Status */
+#define MBOX_RET_SDOS_DECRYPTION_ERROR_102		-258
+#define MBOX_RET_SDOS_DECRYPTION_ERROR_103		-259
+
 /* Reconfig Status Response */
 #define RECONFIG_STATUS_STATE				0
 #define RECONFIG_STATUS_PIN_STATUS			2