stm32mp1: do not include platform header files directly in drivers

Instead, only platform_def.h is included.
The required files to be included are added in stm32mp1_def.h.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
diff --git a/plat/st/stm32mp1/stm32mp1_def.h b/plat/st/stm32mp1/stm32mp1_def.h
index fb21acc..15f0432 100644
--- a/plat/st/stm32mp1/stm32mp1_def.h
+++ b/plat/st/stm32mp1/stm32mp1_def.h
@@ -11,6 +11,12 @@
 #include <lib/utils_def.h>
 #include <lib/xlat_tables/xlat_tables_defs.h>
 
+#ifndef __ASSEMBLY__
+#include <boot_api.h>
+#include <stm32mp1_dt.h>
+#include <stm32mp1_private.h>
+#endif
+
 /*******************************************************************************
  * STM32MP1 memory map related constants
  ******************************************************************************/