i2c: tegra: fix pm_runtime leak on mutex_lock failure

If tegra_i2c_mutex_lock() fails, the function returns without calling
pm_runtime_put(), leaking the runtime PM reference acquired by the
preceding pm_runtime_get_sync(). This prevents the device from ever
entering runtime suspend.

Add the missing pm_runtime_put() before returning on lock failure.

Fixes: 6077cfd ("i2c: tegra: Add support for SW mutex register")
Signed-off-by: Saurav Sachidanand <sauravsc@amazon.com>
Cc: <stable@vger.kernel.org> # v7.0+
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20260507221145.62183-2-sauravsc@amazon.com

Author: Saurav Sachidanand

drivers/i2c/busses/i2c-tegra.c

@@ -1666,8 +1666,10 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
 	}
 
 	ret = tegra_i2c_mutex_lock(i2c_dev);
-	if (ret)
+	if (ret) {
+		pm_runtime_put(i2c_dev->dev);
 		return ret;
+	}
 
 	for (i = 0; i < num; i++) {
 		enum msg_end_type end_type = MSG_END_STOP;