MIPS: Move Alchemy Au1x00 based boards to boards.cfg

CONFIG_GTH2 is already provided by <configs/gth2.h>, so we don't
generate it using the options fields in boards.cfg.

Signed-off-by: Shinya Kuribayashi <skuribay@pobox.com>
diff --git a/boards.cfg b/boards.cfg
index c977528..f1f2506 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -213,6 +213,13 @@
 M53017EVB                    m68k        mcf52x2     m53017evb           freescale
 EP2500                       m68k        mcf52x2     ep2500              Mercury
 microblaze-generic           microblaze  microblaze  microblaze-generic  xilinx
+dbau1000                     mips        mips        dbau1x00            -              -           dbau1x00:DBAU1000
+dbau1100                     mips        mips        dbau1x00            -              -           dbau1x00:DBAU1100
+dbau1500                     mips        mips        dbau1x00            -              -           dbau1x00:DBAU1500
+dbau1550                     mips        mips        dbau1x00            -              -           dbau1x00:DBAU1550
+dbau1550_el                  mips        mips        dbau1x00            -              -           dbau1x00:DBAU1550
+gth2                         mips        mips
+pb1000                       mips        mips        pb1x00              -              -           pb1x00:PB1000
 purple                       mips        mips
 tb0229                       mips        mips
 PCI5441                      nios2       nios2       pci5441             psyent