drm: panel-backlight-quirks: Add secondary DMI match

Using a single DMI match only allows matching per manufacturer.
Introduce a second optional match to allow matching make/model.
In addition, make DMI optional to allow matching only by EDID.

Tested-by: Philip Müller <[e-mail]>
Reviewed-by: Mario Limonciello <[e-mail]>
Signed-off-by: Antheas Kapenekakis <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Acked-by: Alex Deucher <[e-mail]>
Signed-off-by: Mario Limonciello (AMD) <[e-mail]>

drivers/gpu/drm/drm_panel_backlight_quirks.c

···
 #include <drm/drm_edid.h>
 #include <drm/drm_utils.h>
 
+struct drm_panel_match {
+	enum dmi_field field;
+	const char * const value;
+};
+
 struct drm_get_panel_backlight_quirk {
-	struct {
-		enum dmi_field field;
-		const char * const value;
-	} dmi_match;
+	struct drm_panel_match dmi_match;
+	struct drm_panel_match dmi_match_other;
 	struct drm_edid_ident ident;
 	struct drm_panel_backlight_quirk quirk;
 };
···
 	const struct drm_get_panel_backlight_quirk *quirk,
 	const struct drm_edid *edid)
 {
-	if (!dmi_match(quirk->dmi_match.field, quirk->dmi_match.value))
+	if (quirk->dmi_match.field &&
+	    !dmi_match(quirk->dmi_match.field, quirk->dmi_match.value))
+		return false;
+
+	if (quirk->dmi_match_other.field &&
+	    !dmi_match(quirk->dmi_match_other.field,
+		       quirk->dmi_match_other.value))
 		return false;
 
 	if (quirk->ident.panel_id && !drm_edid_match(edid, &quirk->ident))