brcm63xx: fix Sercomm AD1018 status led

The status led part was missed when changing the board name to *-nor.

Fixes: e12c72bb52 ("brcm63xx: Add Sercomm AD1018 support")
Reported-by: Daniel Gonzalez Cabanelas <dgcbueu@gmail.com>
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

target/linux/brcm63xx/base-files/etc/diag.sh

@@ -12,7 +12,7 @@ set_state() {
 	a4001n)
 		status_led="A4001N:green:power"
 		;;
-	ad1018)
+	ad1018-nor)
 		status_led="AD1018:green:power"
 		;;
 	ar-5315u)