The YUV SMPTE patterns use RGB 191/192/192 instead of 192/192/192 for
the grey color in the top color bar.
Change it to 192/192/192, to match the RGB SMPTE patterns.
Fixes: a94ee62429 ("modetest: Add SMPTE test pattern")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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v2:
- Add Reviewed-by.