msm: kgsl: build only a3xx for mako, remove a2xx and a4xx

Change-Id: Ie5e495c871c04e59abfeee80aa609ebcb49657f3
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
msm: kgsl: Fix Z180 memory leak

Decerement entry refcount, which incremented
in kgsl_sharedmem_find_region.

CRs-Fixed: 635747
Change-Id: I621ba8f8e119a9ab8ba5455b28a565e3cae2f7cd
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>