MIPS: dbau1x00: remove custom u-boot.lds script

Remove the board specific linker script. It is not
needed anymore, the unified MIPS linker script can
be used instead.

All dbau1x00 targets are producing identical binary
images after the change than before.
Signed-off-by: NGabor Juhos <juhosg@openwrt.org>
Cc: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>

board/dbau1x00/u-boot.lds

-/*
- * (C) Copyright 2003
- * Wolfgang Denk Engineering, <wd@denx.de>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-OUTPUT_ARCH(mips)
-ENTRY(_start)
-SECTIONS
-{
-	. = 0x00000000;
-
-	. = ALIGN(4);
-	.text       :
-	{
-	  *(.text*)
-	}
-
-	. = ALIGN(4);
-	.rodata  : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
-
-	. = ALIGN(4);
-	.data  : { *(.data*) }
-
-	. = .;
-	_gp = ALIGN(16) + 0x7ff0;
-
-	.got : {
-	  __got_start = .;
-	  *(.got)
-	  __got_end = .;
-	}
-
-	.sdata  : { *(.sdata*) }
-
-	. = ALIGN(4);
-	.u_boot_list : {
-		#include <u-boot.lst>
-	}
-
-	uboot_end_data = .;
-	num_got_entries = (__got_end - __got_start) >> 2;
-
-	. = ALIGN(4);
-	.sbss (NOLOAD)  : { *(.sbss*) }
-	.bss (NOLOAD)  : { *(.bss*) . = ALIGN(4); }
-	uboot_end = .;
-}