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/bl32/tsp/tsp.ld.S b/bl32/tsp/tsp.ld.S
index bdcd2cf..d86ae55 100644
--- a/bl32/tsp/tsp.ld.S
+++ b/bl32/tsp/tsp.ld.S
@@ -71,17 +71,7 @@
     __RW_START__ = . ;
 
     DATA_SECTION >RAM
-
-    /*
-     * .rela.dyn needs to come after .data for the read-elf utility to parse
-     * this section correctly. Ensure 8-byte alignment so that the fields of
-     * RELA data structure are aligned.
-     */
-    . = ALIGN(8);
-    __RELA_START__ = .;
-    .rela.dyn . : {
-    } >RAM
-    __RELA_END__ = .;
+    RELA_SECTION >RAM
 
 #ifdef TSP_PROGBITS_LIMIT
     ASSERT(. <= TSP_PROGBITS_LIMIT, "TSP progbits has exceeded its limit.")