feat(imx8ulp): add trusty support

Support trusty on imx8ulp.

Signed-off-by: Ji Luo <ji.luo@nxp.com>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: I7ada2557023e271a721d50bfe7fd20b5f01cb128
diff --git a/plat/imx/imx8ulp/platform.mk b/plat/imx/imx8ulp/platform.mk
index b267ffc..c90d030 100644
--- a/plat/imx/imx8ulp/platform.mk
+++ b/plat/imx/imx8ulp/platform.mk
@@ -62,3 +62,7 @@
 BL32_SIZE		?=	0x2000000
 $(eval $(call add_define,BL32_BASE))
 $(eval $(call add_define,BL32_SIZE))
+
+ifeq (${SPD},trusty)
+	BL31_CFLAGS    +=      -DPLAT_XLAT_TABLES_DYNAMIC=1
+endif