stm32mp1: make functions and macros more common

Mainly remove suffix 1 from prefix stm32mp1 in several macros and functions
that can be used in drivers shared by different platforms.

Change-Id: I2295c44f5b1edac7e80a93c0e8dfd671b36e88e7
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
diff --git a/plat/st/stm32mp1/stm32mp1_private.c b/plat/st/stm32mp1/stm32mp1_private.c
index f3beb59..20eb88e 100644
--- a/plat/st/stm32mp1/stm32mp1_private.c
+++ b/plat/st/stm32mp1/stm32mp1_private.c
@@ -8,8 +8,8 @@
 
 #include <lib/xlat_tables/xlat_tables_v2.h>
 
-#define MAP_SRAM	MAP_REGION_FLAT(STM32MP1_SRAM_BASE, \
-					STM32MP1_SRAM_SIZE, \
+#define MAP_SRAM	MAP_REGION_FLAT(STM32MP_SYSRAM_BASE, \
+					STM32MP_SYSRAM_SIZE, \
 					MT_MEMORY | \
 					MT_RW | \
 					MT_SECURE | \