iopsys-brcm63xx-arm: disc: board_data: add quotations around json_load args

iopsys-brcm63xx-arm/disc/base-files/etc/init.d/board_data

@@ -12,7 +12,7 @@ boot() {
 		return 0
 	}
 
-	json_load $(jq -R -n -c '[inputs|split("=")|{(.[0]):.[1]}] | add' $BDFILE)
+	json_load "$(jq -R -n -c '[inputs|split("=")|{(.[0]):.[1]}] | add' $BDFILE)"
 	json_get_var serial_number sn "00000000"
 	json_get_var basemac mac "00:00:00:00:00:00"
 	json_get_var hardware_version hwver "0"