feat(stm32mp1-fdts): add DDR support for STM32MP13

Add dedicated device tree files for STM32MP13.
Add new DDR compatible for STM32MP13x.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Change-Id: Ib1bb9ad8cb2ab9f5f81549635d6604093aeb99d3
diff --git a/plat/st/stm32mp1/stm32mp1_def.h b/plat/st/stm32mp1/stm32mp1_def.h
index 31f80d9..d869978 100644
--- a/plat/st/stm32mp1/stm32mp1_def.h
+++ b/plat/st/stm32mp1/stm32mp1_def.h
@@ -614,7 +614,12 @@
  * Device Tree defines
  ******************************************************************************/
 #define DT_BSEC_COMPAT			"st,stm32mp15-bsec"
+#if STM32MP13
+#define DT_DDR_COMPAT			"st,stm32mp13-ddr"
+#endif
+#if STM32MP15
 #define DT_DDR_COMPAT			"st,stm32mp1-ddr"
+#endif
 #define DT_IWDG_COMPAT			"st,stm32mp1-iwdg"
 #define DT_NVMEM_LAYOUT_COMPAT		"st,stm32-nvmem-layout"
 #define DT_PWR_COMPAT			"st,stm32mp1,pwr-reg"