target: copper: Add support to detect volume down key based on pmic versions.

Change-Id: Ifd8d28cc11dff1e0830063f76a9217a1a482d725
diff --git a/target/copper/init.c b/target/copper/init.c
index dfbb23a..499047b1 100644
--- a/target/copper/init.c
+++ b/target/copper/init.c
@@ -98,7 +98,10 @@
 uint32_t target_volume_down()
 {
 	/* Volume down button is tied in with RESIN on MSM8974. */
-	return pm8x41_resin_bark_workaround_status();
+	if (pm8x41_get_pmic_rev() == PMIC_VERSION_V2)
+		return pm8x41_resin_bark_workaround_status();
+	else
+		return pm8x41_resin_status();
 }
 
 static void target_keystatus()