media: intel-ipu6: Use new model name for downstream driver

So huge changes were made to upstream IPU6 ISYS driver, that
downstream & upstream IPU6 driver are totally different things for
userspace. The driver name "ipu6" is already hold by upstream driver,
so we have to change downstream driver name to "ipu6-downstream" to
let userspace driver distinguish them. Userspace driver will use
downstream logic when driver says it is "ipu6-downstream".

Signed-off-by: Hongju Wang <[email protected]>
Signed-off-by: Hao Yao <[email protected]>

drivers/media/pci/intel/ipu6/ipu-platform.h

@@ -27,7 +27,7 @@
  * that the software components which uses IPU driver can get the hw stepping
  * information.
  */
-#define IPU_MEDIA_DEV_MODEL_NAME		"ipu6"
+#define IPU_MEDIA_DEV_MODEL_NAME		"ipu6-downstream"
 
 #define IPU6SE_ISYS_NUM_STREAMS          IPU6SE_NONSECURE_STREAM_ID_MAX
 #define IPU6_ISYS_NUM_STREAMS            IPU6_NONSECURE_STREAM_ID_MAX