msm: 8960ab: Don't add gfx2d footswitches on 8960ab

8960ab doesn't have any gfx2d hardware, so we shouldn't add the
gfx2d footswitches on this device. By not adding them we avoid
probe errors in the kernel logs.

Change-Id: If824ef5cf83a42ed33015e0b4b33f30125efcf1d
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
3 files changed