radeon: Fix command type for DRM_RADEON_IRQ_EMIT ioctl.

This should be drmCommandWriteRead to avoid an EINVAL error on systems
that strictly check ioctl args. This command has been r/w for ever.
Discussion with airlied agreed that this was the correct course.

Signed-off-by: Brian Paul <brianp@vmware.com>
1 file changed