ANDROID: GKI: disable the android debug symbols "driver"

A number of kernel symbols that the debug driver was wanting to export
for various reasons are no longer present, so disable the driver from
the build and remove it from the gki_defconfig files.

Bug: 170851792
Bug: 169101608
Change-Id: I785de30e29a012ef073896c0dd44cb0ce9630125
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>