MIPS: update the MIPS u-boot.lds

From the document, if set all arguments in "OUTPUT_FORMAT" to
"tradbigmips", then even add "-EL" to gcc we still get EB format.

pb1x00 is only used in Little-endian, so its default endian should be
set to LE.

Signed-off-by: Xiangfu Liu <xiangfu@openmobilefree.net>
Signed-off-by: Shinya Kuribayashi <skuribay@pobox.com>
diff --git a/board/purple/u-boot.lds b/board/purple/u-boot.lds
index 1881e65..542601a 100644
--- a/board/purple/u-boot.lds
+++ b/board/purple/u-boot.lds
@@ -24,7 +24,7 @@
 /*
 OUTPUT_FORMAT("elf32-bigmips", "elf32-bigmips", "elf32-bigmips")
 */
-OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips", "elf32-tradbigmips")
+OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips", "elf32-tradlittlemips")
 OUTPUT_ARCH(mips)
 ENTRY(_start)
 SECTIONS