MIPS: BCM47XX: add board detection for Linksys WRT54GS V1

This adds board detection for Linksys WRT54GS V1.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6317/

diff --cc arch/mips/bcm47xx/board.c
Simple merge

diff --cc arch/mips/include/asm/mach-bcm47xx/bcm47xx_board.h
Simple merge