libgralloc: Use ION_IOC_CUSTOM instead of MSM-specific ioctls

Use ION_IOC_CUSTOM instead of ION_IOC_CLEAN_INV_CACHES.
ION_IOC_CLEAN_INV_CACHES is now specified as a command argument of the
ION_IOC_CUSTOM ioctl.

Change-Id: I5b59ba1032364dfb884a90abf2ee2b35f3c09dd6
gralloc: Remove update rect

SurfaceFlinger does not use this feature any more.
Removing this to avoid usage of reserved flags.
If this is needed again, it can be added with metadata
in the display commit ioctl

Change-Id: Iaf3f14a910ad64c83abb0910fad4a999b663c545
gralloc: Override gralloc calculated size only if bufferSize is greater.

bufferSize set using native window set buffer size will override gralloc
calculated size only if bufferSize is greater.
Fix for 720P, 1080P HD content playback is not working on 7x27A due to
buffer size mismatch between requested size by frameworks and allocated
size by gralloc for HAL_PIXEL_FORMAT_YCrCb_420_SP and
HAL_PIXEL_FORMAT_YCrCb_420_SP format

Change-Id: I16d04e406ab8f1f35e0e0a70e19d99a019adc5ef
CRs-Fixed: 451783
Acked-by: Ramkumar Radhakrishnan <ramkumar@codeaurora.org>
display: Properly handle NO_IOMMU case

 * Enable it by default for msm8660 too.

Change-Id: Icbd5de1e7f020285ff6101c34286ca8863b11040