i2c: qup: Fix pm_runtime_get_sync usage

This patch corrects the error check on the call to pm_runtime_get_sync.
Signed-off-by: Andy Gross <agross@codeaurora.org>
Reviewed-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-qup.c

@@ -479,7 +479,7 @@ static int qup_i2c_xfer(struct i2c_adapter *adap,
 	int ret, idx;
 
 	ret = pm_runtime_get_sync(qup->dev);
-	if (ret)
+	if (ret < 0)
 		goto out;
 
 	writel(1, qup->base + QUP_SW_RESET);