parse-root-opts: first check for ro, later for rw

This order is already in 98usrmount.

modules.d/99base/parse-root-opts.sh

@@ -5,8 +5,8 @@
 root=$(getarg root=)
 
 rflags="$(getarg rootflags=)"
-getargbool 0 rw && rflags="${rflags},rw"
 getargbool 0 ro && rflags="${rflags},ro"
+getargbool 0 rw && rflags="${rflags},rw"
 rflags="${rflags#,}"
 
 fstype="$(getarg rootfstype=)"