mxs: use generic sysinfo board detection

Since we do nothing special for mxs based boards,
we can simply use the generic existing code.
We just need to convert scripts to use the DT
compatible strings.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

target/linux/mxs/base-files/etc/diag.sh

@@ -6,10 +6,10 @@
 
 get_status_led() {
 	case $(board_name) in
-	duckbill)
+	i2se,duckbill*)
 		status_led="duckbill:green:status"
 		;;
-	olinuxino)
+	olimex,imx23-olinuxino)
 		status_led="green"
 		;;
 	*)