plat/arm: Add dependencies to configuration files

This patch adds dependencies to the generated configuration
files that are included in the FIP. This fixes occasional
build errors that occur when the FIP happens to be built first.

Change-Id: I5a2bf724ba3aee13954403b141f2f19b4fd51d1b
Signed-off-by: Anders Dellien <anders.dellien@arm.com>
diff --git a/plat/arm/board/sgi575/platform.mk b/plat/arm/board/sgi575/platform.mk
index f5d547d..56f5733 100644
--- a/plat/arm/board/sgi575/platform.mk
+++ b/plat/arm/board/sgi575/platform.mk
@@ -42,15 +42,15 @@
 TB_FW_CONFIG		:=	${BUILD_PLAT}/fdts/${PLAT}_tb_fw_config.dtb
 
 # Add the FW_CONFIG to FIP and specify the same to certtool
-$(eval $(call TOOL_ADD_PAYLOAD,${FW_CONFIG},--fw-config))
+$(eval $(call TOOL_ADD_PAYLOAD,${FW_CONFIG},--fw-config,${FW_CONFIG}))
 # Add the TB_FW_CONFIG to FIP and specify the same to certtool
-$(eval $(call TOOL_ADD_PAYLOAD,${TB_FW_CONFIG},--tb-fw-config))
+$(eval $(call TOOL_ADD_PAYLOAD,${TB_FW_CONFIG},--tb-fw-config,${TB_FW_CONFIG}))
 
 FDT_SOURCES		+=	${SGI575_BASE}/fdts/${PLAT}_nt_fw_config.dts
 NT_FW_CONFIG		:=	${BUILD_PLAT}/fdts/${PLAT}_nt_fw_config.dtb
 
 # Add the NT_FW_CONFIG to FIP and specify the same to certtool
-$(eval $(call TOOL_ADD_PAYLOAD,${NT_FW_CONFIG},--nt-fw-config))
+$(eval $(call TOOL_ADD_PAYLOAD,${NT_FW_CONFIG},--nt-fw-config,${NT_FW_CONFIG}))
 
 ifneq ($(CSS_SGI_CHIP_COUNT),1)
  $(error  "Chip count for SGI575 should be 1, currently set to \