soc: qcom: smd: Reset rx tail rather than tx

The local end of each SMD channel is responsible for updating the tx
head and the rx tail, as such we should not touch the tx tail during a
reset.
Reported-by: NJeremy McNicoll <jmcnicol@redhat.com>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: NAndy Gross <andy.gross@linaro.org>

drivers/soc/qcom/smd.c

@@ -363,7 +363,7 @@ static void qcom_smd_channel_reset(struct qcom_smd_channel *channel)
 	SET_TX_CHANNEL_FLAG(channel, fSTATE, 1);
 	SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 1);
 	SET_TX_CHANNEL_INFO(channel, head, 0);
-	SET_TX_CHANNEL_INFO(channel, tail, 0);
+	SET_RX_CHANNEL_INFO(channel, tail, 0);
 
 	qcom_smd_signal_channel(channel);