UPSTREAM: drm/rockchip: cleanup unnecessary export symbol
Now rockchip_drm_vop.c is build into rockchipdrm.ko, so
no need to export following symbol anymore:
rockchip_drm_dma_attach_device
rockchip_drm_dma_detach_device
rockchip_drm_dma_attach_device
rockchip_drm_dma_detach_device
rockchip_register_crtc_funcs
rockchip_unregister_crtc_funcs
rockchip_fb_get_gem_obj
Change-Id: Ic6cc7cb83efca4f74f1e70e3568abdfb83d2886f
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
(cherry picked from commit
63087aae5a7976a4557d16873146eae03948ec74)