drm/amd/display: add support for 2nd sharpening range

[Why & How]
Add support for 2nd sharpening range for cases where we want
override existing DCN sharpening range.

Reviewed-by: Alvin Lee <[email protected]>
Signed-off-by: Samson Tam <[email protected]>
Signed-off-by: Tom Chung <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Samson Tam

drivers/gpu/drm/amd/display/dc/sspl/dc_spl_types.h

@@ -480,6 +480,10 @@ enum sharpness_setting	{
 	SHARPNESS_ZERO,
 	SHARPNESS_CUSTOM
 };
+enum sharpness_range_source	{
+	SHARPNESS_RANGE_DCN = 0,
+	SHARPNESS_RANGE_DCN_OVERRIDE
+};
 struct spl_sharpness_range {
 	int sdr_rgb_min;
 	int sdr_rgb_max;