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/include/platform_def.h b/plat/imx/imx8ulp/include/platform_def.h
index fc646cb..7153726 100644
--- a/plat/imx/imx8ulp/include/platform_def.h
+++ b/plat/imx/imx8ulp/include/platform_def.h
@@ -99,6 +99,10 @@
 
 #define BL32_FDT_OVERLAY_ADDR		0x9d000000
 
+#ifdef SPD_trusty
+#define IMX_TRUSTY_STACK_SIZE 0x100
+#endif
+
 /* system memory map define */
 #define DEVICE0_MAP	MAP_REGION_FLAT(DEVICE0_BASE, DEVICE0_SIZE, MT_DEVICE | MT_RW)
 #define DEVICE1_MAP	MAP_REGION_FLAT(DEVICE1_BASE, DEVICE1_SIZE, MT_DEVICE | MT_RW)