This flag isn't used by user mode drivers, remove it to avoid
confusion. And rename GTT_WC to GTT_USWC to make it clear.
Signed-off-by: NJammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>

This header defines the ioctl interface to the driver.

v2: remove stale tiling defines
v3: add appropriate padding
v4: remove executable bits on header
Acked-by: NChristian König <christian.koenig@amd.com>
Acked-by: NJammy Zhou <Jammy.Zhou@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>