ramips: dont replace the board name

Use fixed led names and add each board variant instead of manipulating
the board name.

It makes the ramips board name function less different to the one used
in other targets and allows to merge them with a common function.

Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/ramips/base-files/lib/ramips.sh

@@ -696,5 +696,5 @@ ramips_board_name() {
 	[ -f /tmp/sysinfo/board_name ] && name=$(cat /tmp/sysinfo/board_name)
 	[ -z "$name" ] && name="unknown"
 
-	echo "${name%-[0-9]*M}"
+	echo "${name}"
 }