linker_script: move .rela.dyn section to bl_common.ld.h

The .rela.dyn section is the same for BL2-AT-EL3, BL31, TSP.

Move it to the common header file.

I slightly changed the definition so that we can do "RELA_SECTION >RAM".
It still produced equivalent elf images.

Please note I got rid of '.' from the VMA field. Otherwise, if the end
of previous .data section is not 8-byte aligned, it fails to link.

aarch64-linux-gnu-ld.bfd: warning: changing start of section .rela.dyn by 4 bytes
aarch64-linux-gnu-ld.bfd: warning: changing start of section .rela.dyn by 4 bytes
aarch64-linux-gnu-ld.bfd: warning: changing start of section .rela.dyn by 4 bytes
make: *** [Makefile:1071: build/qemu/release/bl31/bl31.elf] Error 1

Change-Id: Iba7422d99c0374d4d9e97e6fd47bae129dba5cc9
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/include/common/bl_common.ld.h b/include/common/bl_common.ld.h
index 208e3d6..ab3391a 100644
--- a/include/common/bl_common.ld.h
+++ b/include/common/bl_common.ld.h
@@ -101,6 +101,17 @@
 		__DATA_END__ = .;			\
 	}
 
+/*
+ * .rela.dyn needs to come after .data for the read-elf utility to parse
+ * this section correctly.
+ */
+#define RELA_SECTION					\
+	.rela.dyn : ALIGN(STRUCT_ALIGN) {		\
+		__RELA_START__ = .;			\
+		*(.rela*)				\
+		__RELA_END__ = .;			\
+	}
+
 #if !(defined(IMAGE_BL31) && RECLAIM_INIT_CODE)
 #define STACK_SECTION					\
 	stacks (NOLOAD) : {				\