radio: iris: Fixed the issue with RDS configuration

This patch configures the rds registers properly

CRs-fixed: 298431
Signed-off-by: Srinivasa Rao Uppala <uppalas@codeaurora.org>
diff --git a/include/media/radio-iris.h b/include/media/radio-iris.h
index 79a71244..9353a99 100644
--- a/include/media/radio-iris.h
+++ b/include/media/radio-iris.h
@@ -426,6 +426,7 @@
 #define RDS_PS_LENGTH_OFFSET 7
 #define RDS_STRING 8
 #define RDS_PS_DATA_OFFSET 8
+#define RDS_CONFIG_OFFSET  3
 
 /*FM states*/