lcameraDev: honor opt-planar when selecting YUV capture format.

Pass fullPlanarIsOptional through session configure so optional planar
mode can succeed with packed YUYV; extend unit and configure HIL coverage.

Co-authored-by: Cursor <cursoragent@cursor.com>

commonLibs/lcameraDev/cameraModeRequest.h

@@ -17,8 +17,8 @@ struct LcameraDevCameraModeRequest
 	LcameraDevColourSpace colourSpace = LcameraDevColourSpace::Yuv;
 	/**	EXPLANATION:
 	 * When false, configure must select a fully planar YUV pixel format.
-	 * When true, relaxed non-planar formats are not honored at the configure
-	 * API yet — producer-side deinterleaving is not implemented (Stage 2).
+	 * When true, configure may accept semi-planar or packed YUV; lcameraBuff
+	 * deinterleaves components in later capture stages.
 	 */
 	bool fullPlanarIsOptional = false;
 };
@@ -34,11 +34,6 @@ struct LcameraDevConfiguredCameraMode
 
 void validateCameraModeRequest(const LcameraDevCameraModeRequest& request);
 
-/** Rejects fullPlanarIsOptional at the configure API until non-planar fallback
- * paths exist in lcameraBuff. */
-void rejectFullPlanarOptionalAtConfigureApi(
-	const LcameraDevCameraModeRequest& request);
-
 bool cameraModeRequestsEqual(
 	const LcameraDevCameraModeRequest& left,
 	const LcameraDevCameraModeRequest& right);