feat(plat/imx/imx8m/imx8mm): add support for measured boot

Add helper functions to generate event log for imx8mm
when MEASURED_BOOT=1.

Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
Change-Id: Ifc947d749055787fbda0b39170aa2eb8865b7802
diff --git a/plat/imx/imx8m/imx8mm/include/platform_def.h b/plat/imx/imx8m/imx8mm/include/platform_def.h
index 6709678..300ef9e 100644
--- a/plat/imx/imx8m/imx8mm/include/platform_def.h
+++ b/plat/imx/imx8m/imx8mm/include/platform_def.h
@@ -152,3 +152,7 @@
 #define MAX_IO_HANDLES			3U
 #define MAX_IO_DEVICES			2U
 #define MAX_IO_BLOCK_DEVICES		1U
+
+#define PLAT_IMX8M_DTO_BASE		0x53000000
+#define PLAT_IMX8M_DTO_MAX_SIZE		0x1000
+#define PLAT_IMX_EVENT_LOG_MAX_SIZE	UL(0x400)