drm/edid: fix edid field name

Byte 26 in a edid struct is supposed to be "Blue and white
least-significant 2 bits", not "black and white". Rename the field
accordingly. This field is not used anywhere, so just renaming it here
for correctness.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Simon Ser <contact@emersion.fr>
Signed-off-by: Simon Ser <contact@emersion.fr>
Link: https://patchwork.freedesktop.org/patch/msgid/20210811205818.156100-1-lucas.demarchi@intel.com

include/drm/drm_edid.h

@@ -336,7 +336,7 @@ struct edid {
 	u8 features;
 	/* Color characteristics */
 	u8 red_green_lo;
-	u8 black_white_lo;
+	u8 blue_white_lo;
 	u8 red_x;
 	u8 red_y;
 	u8 green_x;