feat(stm32mp2): disable PIE by default on STM32MP2 platform

Allow to disable ENABLE_PIE on STM32MP2. BL31 is loaded at the beginning
of SYSRAM whatever the options set. Set ENABLE_PIE to 0 by default.
This should allow us to reduce BL31 and BL2 size.

Change-Id: Ie8c83c9205e81301eb1fdcf24b94216172586630
Signed-off-by: Maxime Méré <maxime.mere@foss.st.com>
diff --git a/plat/st/stm32mp2/include/platform_def.h b/plat/st/stm32mp2/include/platform_def.h
index d3167af..523f9bb 100644
--- a/plat/st/stm32mp2/include/platform_def.h
+++ b/plat/st/stm32mp2/include/platform_def.h
@@ -73,8 +73,15 @@
 /*******************************************************************************
  * BL31 specific defines.
  ******************************************************************************/
+#if ENABLE_PIE
 #define BL31_BASE			0
-#define BL31_LIMIT			(STM32MP_SYSRAM_SIZE / 2)
+#else
+#define BL31_BASE			STM32MP_SYSRAM_BASE
+#endif
+
+#define BL31_LIMIT			(BL31_BASE + (STM32MP_SYSRAM_SIZE / 2))
+
+#define BL31_PROGBITS_LIMIT		(BL31_BASE + STM32MP_BL31_SIZE)
 
 /*******************************************************************************
  * BL33 specific defines.