wacom: Fix discrepancy when switching monitors from g-c-c

The rotation was being set directly from g-c-c when switching
monitors but g-s-d already does this when the display is set to
the tablet. This resulted in a discrepancy between setting the
monitor from g-c-c or from g-s-d when the left-handed mode was on.

https://bugzilla.gnome.org/show_bug.cgi?id=700439