fff-babeld: clean up type/rxcost option handling

Signed-off-by: Johannes Kimmel <fff@bareminimum.eu>

src/packages/fff/fff-babeld/files/etc/layer3.d/40-babel

@@ -47,18 +47,10 @@ configure() {
 		fi
 
 		# get type
-		if type=$(uci -q get gateway.$name.type); then
-			type="$type"
-		else
-			type=wired
-		fi
+		type=$(uci -q get gateway.$name.type) || type=wired
 
 		# get rxcost
-		if rxcost=$(uci -q get gateway.$name.rxcost); then
-			rxcost="$rxcost"
-		else
-			rxcost=96
-		fi
+		rxcost=$(uci -q get gateway.$name.rxcost) || rxcost=96
 
 		# add interface
 		uci set network.$prefixname=interface