[Intel-gfx] [drm-intel:drm-intel-nightly 1499/1516] drivers/gpu/drm/arc/arcpgu_crtc.c:67:22: sparse: symbol 'arc_pgu_crtc_mode_valid' was not declared. Should it be static?

[kbuild test robot]

tree:   git://anongit.freedesktop.org/drm-intel drm-intel-nightly
head:   cd6f0ef4478545aa014d92cabe4d794bfe54fe33
commit: 2b3d860efa3461af109469e6de2eea48f6ef5cdd [1499/1516] drm: arcpgu: Use crtc->mode_valid() callback
reproduce:
        # apt-get install sparse
        git checkout 2b3d860efa3461af109469e6de2eea48f6ef5cdd
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/gpu/drm/arc/arcpgu_crtc.c:67:22: sparse: symbol 'arc_pgu_crtc_mode_valid' was not declared. Should it be static?

Please review and possibly fold the followup patch.

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