fvp: ts: Update TS/PSA makefile to use introduced SPMC_AT_EL flag

With the introduced SPMC_AT_EL in `fvp.mk`, some of the extra TF-A
flags set in these makefiles are redundant if SPMC_AT_EL flag is set
to 1.

Suggested-by: Balint Dobszay <balint.dobszay@arm.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
diff --git a/trusted-services.mk b/trusted-services.mk
index 16f9d92..f487560 100644
--- a/trusted-services.mk
+++ b/trusted-services.mk
@@ -91,7 +91,7 @@
 optee-os-common: $(TS_INSTALL_PREFIX)/sp_layout.json
 
 # Configure TF-A to load the SPs from FIP by BL2
-TF_A_FIP_SP_FLAGS += ARM_BL2_SP_LIST_DTS=$(ROOT)/build/fvp/bl2_sp_list.dtsi \
+TF_A_FLAGS += ARM_BL2_SP_LIST_DTS=$(ROOT)/build/fvp/bl2_sp_list.dtsi \
 		SP_LAYOUT_FILE=$(TS_INSTALL_PREFIX)/sp_layout.json
 endif