Move BL_COHERENT_RAM_BASE/END defines to common_def.h

We have lots of duplicated defines (and comment blocks too).
Move them to include/plat/common/common_def.h.

While we are here, suffix the end address with _END instead of
_LIMIT.  The _END is a better fit to indicate the linker-derived
real end address.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/plat/qemu/qemu_bl1_setup.c b/plat/qemu/qemu_bl1_setup.c
index 4438aac..21217d7 100644
--- a/plat/qemu/qemu_bl1_setup.c
+++ b/plat/qemu/qemu_bl1_setup.c
@@ -36,18 +36,6 @@
 #include <platform_def.h>
 #include "qemu_private.h"
 
-
-/*
- * The next 2 constants identify the extents of the coherent memory region.
- * These addresses are used by the MMU setup code and therefore they must be
- * page-aligned.  It is the responsibility of the linker script to ensure that
- * __COHERENT_RAM_START__ and __COHERENT_RAM_END__ linker symbols refer to
- * page-aligned addresses.
- */
-#define BL1_COHERENT_RAM_BASE (unsigned long)(&__COHERENT_RAM_START__)
-#define BL1_COHERENT_RAM_LIMIT (unsigned long)(&__COHERENT_RAM_END__)
-
-
 /*******************************************************************************
  * Declarations of linker defined symbols which will tell us where BL1 lives
  * in Trusted RAM
@@ -98,7 +86,7 @@
 	qemu_configure_mmu_el3(bl1_tzram_layout.total_base,
 				bl1_tzram_layout.total_size,
 				BL1_RO_BASE, BL1_RO_LIMIT,
-				BL1_COHERENT_RAM_BASE, BL1_COHERENT_RAM_LIMIT);
+				BL_COHERENT_RAM_BASE, BL_COHERENT_RAM_END);
 }
 
 void bl1_platform_setup(void)