Combine Travis CI option-setting commands (#12474)

buildroot/bin/opt_enable

@@ -5,3 +5,7 @@ SED=$(which gsed || which sed)
 for opt in "$@" ; do
   eval "${SED} -i 's/\/\/[[:blank:]]*\(#define \b${opt}\b\)/\1/g' Marlin/Configuration.h"
 done
+
+for opt in "$@" ; do
+  eval "${SED} -i 's/\/\/[[:blank:]]*\(#define \b${opt}\b\)/\1/g' Marlin/Configuration_adv.h"
+done