gpu: nvgpu: select map access type from dmabuf permission and user request

Add api to translate dmabuf's fmode_t to gk20a_mem_rw_flag
for read only/read write mapping selection.

By default dmabuf fd mapping permission should be a maximum
access permission associated to a particual dmabuf fd.

Remove bit flag MAP_ACCESS_NO_WRITE and add 2 bit values for
user access requests NVGPU_VM_MAP_ACCESS_DEFAULT|READ_ONLY|
READ_WRITE.

To unify map access type handling in Linux and QNX move the
parameter NVGPU_VM_MAP_ACCESS_* check to common function
nvgpu_vm_map.

Set MAP_ACCESS_TYPE enabled flag in common characteristics
init function as it is supported for Linux and QNX.

Bug 200717195
Bug 3250920

Change-Id: I1a249f7c52bda099390dd4f371b005e1a7cef62f
Signed-off-by: Lakshmanan M <lm@nvidia.com>
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2507150
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/include/nvgpu/linux/vm.h

@@ -56,6 +56,7 @@ struct nvgpu_mapped_buf_priv {
 int nvgpu_vm_map_linux(struct vm_gk20a *vm,
 		       struct dma_buf *dmabuf,
 		       u64 map_addr,
+		       u32 map_access_requested,
 		       u32 flags,
 		       u32 page_size,
 		       s16 compr_kind,