[radeon-alex:drm-next-4.18-wip 114/129] drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c:689:6: sparse: symbol 'vcn_v1_0_is_idle' was not declared. Should it be static?

[kbuild test robot]

tree:   git://people.freedesktop.org/~agd5f/linux.git drm-next-4.18-wip
head:   27bd044dd054fed87166c831b6d38bc609e733cc
commit: 9b4c412a654ce71ad0e81044d3300677a7668ac8 [114/129] drm/amdgpu: Add static CG control for VCN on RV
reproduce:
        # apt-get install sparse
        git checkout 9b4c412a654ce71ad0e81044d3300677a7668ac8
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c:689:6: sparse: symbol 'vcn_v1_0_is_idle' was not declared. Should it be static?
>> drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c:696:5: sparse: symbol 'vcn_v1_0_wait_for_idle' was not declared. Should it be static?

Please review and possibly fold the followup patch.

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