fix(stm32mp1): always define PKA algos flags

The flags to set PKA algo are set to 0 when TRUSTED_BOARD_BOOT is not
set.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: Ib70a2bc51451a2047d7a50a8307e9063d4a2a0ee
diff --git a/plat/st/stm32mp1/platform.mk b/plat/st/stm32mp1/platform.mk
index 75c2383..55423ae 100644
--- a/plat/st/stm32mp1/platform.mk
+++ b/plat/st/stm32mp1/platform.mk
@@ -73,6 +73,9 @@
 endif
 endif
 
+PKA_USE_NIST_P256	?=	0
+PKA_USE_BRAINPOOL_P256T1 ?=	0
+
 ifeq ($(AARCH32_SP),sp_min)
 # Disable Neon support: sp_min runtime may conflict with non-secure world
 TF_CFLAGS		+=	-mfloat-abi=soft