TF700T: Disable overlays

Dock overlays and performance profiles are not supported by now

Change-Id: Ic5b30c078482a3531b8052a7cc5168c25460cd15
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
tf700t: disable additional overlay for 4.4 bringup

Change-Id: I8ea7b3d6af8b02f999af020907247144d84b2a2c