plat: imx8mm: Add the support for opteed spd on imx8mq/imx8mm

Add the basic support for opteed SPD on imx8mq & imx8mm.

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: I6c4855c89dea78d13d172c3d86cf047f829e51ce
diff --git a/plat/imx/imx8m/imx8mm/platform.mk b/plat/imx/imx8m/imx8mm/platform.mk
index 6d32dbb..c0cb6c2 100644
--- a/plat/imx/imx8m/imx8mm/platform.mk
+++ b/plat/imx/imx8m/imx8mm/platform.mk
@@ -45,3 +45,9 @@
 ERRATA_A53_835769	:=	1
 ERRATA_A53_843419	:=	1
 ERRATA_A53_855873	:=	1
+
+BL32_BASE		?=	0xbe000000
+$(eval $(call add_define,BL32_BASE))
+
+BL32_SIZE		?=	0x2000000
+$(eval $(call add_define,BL32_SIZE))