base-files: board.json's switch reset means existence, not argument

Don't pass the value unconditionally to swconfig as a parameter but
instead only call reset if it is 1.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

package/base-files/files/lib/preinit/10_indicate_preinit

@@ -43,7 +43,10 @@ preinit_config_switch() {
 			json_select ..
 
 			if [ "$device" = "$lan_if" ]; then
-				swconfig dev $name set reset $reset
+				if [ "$reset" -eq "1" ]; then
+					swconfig dev $name set reset
+				fi
+
 				swconfig dev $name set enable_vlan $enable
 				swconfig dev $name vlan $role set ports "$ports"
 				swconfig dev $name set apply