i2c: omap: on ->remove() call pm_runtime_put_sync()

we're about to remove the module, so we can't
really schedule a PM transition in the future,
we must wait for it to finish.

Signed-off-by: Felipe Balbi <[e-mail]>
Signed-off-by: Wolfram Sang <[e-mail]>

drivers/i2c/busses/i2c-omap.c

···
 		return ret;
 
 	omap_i2c_write_reg(omap, OMAP_I2C_CON_REG, 0);
-	pm_runtime_put(&pdev->dev);
+	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 	return 0;
 }