staging: android: ion: Set the length of the DMA sg entries in buffer.

ion_buffer_create() will allocate a buffer and then create a DMA
mapping for it, but it forgot to set the length of the page entries.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
drm: arm: Add support for PRIME and dma_buf buffer sharing.

Add support for buffer sharing in HDLCD and implement proprietary
IOCTL from ARM Mali driver to get a file descriptor for the buffer.
This is used by the Mali kernel driver to import the buffers into
DDK and enable double buffering.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>