NOUPSTREAM: ANDROID: dma-buf: DMA-BUF Exports

[CPNOTE: 06/07/21] Lee: Vendor GKI code

Squash:

  NOUPSTREAM: ANDROID: dma-heap: Provide accessors so that in-kernel drivers can allocate dmabufs from specific heaps
  NOUPSTREAM: ANDROID: dma-buf: heaps: Allow cma heaps to be configured as a module
  NOUPSTREAM: ANDROID: dma-buf: heaps: Allow the DMA-BUF system heap to be a module
  NOUPSTREAM: ANDROID: dma-buf: heap: export dma_heap_put
  NOUPSTREAM: ANDROID: Add EXPORT_SYMBOL_GPL for dma_heap_get_name

Bug: 155218010
Bug: 154341375
Bug: 175697666
Bug: 172527615
Bug: 176262479
Bug: 167709539
Change-Id: I7e63c8e757d8cbbfaa1ef34eba8f589d70ba0b91
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Lee Jones <joneslee@google.com>