plat: intel: Add BL31 support to Intel Stratix10 SoCFPGA platform

This adds BL31 support to Intel Stratix10 SoCFPGA platform. BL31 in TF-A
supports:
- PSCI calls to enable 4 CPU cores
- PSCI mailbox calls for FPGA reconfiguration

Signed-off-by: Loh Tien Hock <tien.hock.loh@intel.com>
diff --git a/plat/intel/soc/stratix10/platform.mk b/plat/intel/soc/stratix10/platform.mk
index 01b0c76..debdea1 100644
--- a/plat/intel/soc/stratix10/platform.mk
+++ b/plat/intel/soc/stratix10/platform.mk
@@ -46,8 +46,23 @@
 		plat/intel/soc/stratix10/soc/s10_system_manager.c	\
                 common/desc_image_load.c
 
-#		plat/intel/soc/stratix10/plat_topology.c		\
+BL31_SOURCES	+=	drivers/arm/cci/cci.c				\
+		lib/cpus/aarch64/cortex_a53.S				\
+			lib/cpus/aarch64/aem_generic.S			\
+			lib/cpus/aarch64/cortex_a53.S			\
+			plat/common/plat_psci_common.c			\
+			plat/intel/soc/stratix10/plat_sip_svc.c		\
+			plat/intel/soc/stratix10/bl31_plat_setup.c 	\
+			plat/intel/soc/stratix10/plat_psci.c		\
+			plat/intel/soc/stratix10/plat_topology.c	\
+			plat/intel/soc/stratix10/plat_delay_timer.c	\
+			plat/intel/soc/stratix10/soc/s10_reset_manager.c\
+			plat/intel/soc/stratix10/soc/s10_pinmux.c	\
+			plat/intel/soc/stratix10/soc/s10_clock_manager.c\
+			plat/intel/soc/stratix10/soc/s10_handoff.c	\
+			plat/intel/soc/stratix10/soc/s10_mailbox.c	\
 
 PROGRAMMABLE_RESET_ADDRESS	:= 0
 BL2_AT_EL3			:= 1
 MULTI_CONSOLE_API		:= 1
+USE_COHERENT_MEM		:= 1