i2c: omap: fix cleanup regression

Patch "i2c: omap: abolish variable name confusion" triggered a
coccinelle warning which we fix here:

drivers/i2c/busses/i2c-omap.c:1333:5-24: pm_runtime_get_sync returns < 0 as error. Unecessary IS_ERR_VALUE at line 1334
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-omap.c

@@ -1342,7 +1342,7 @@ omap_i2c_probe(struct platform_device *pdev)
 	pm_runtime_use_autosuspend(omap->dev);
 
 	r = pm_runtime_get_sync(omap->dev);
-	if (IS_ERR_VALUE(r))
+	if (r < 0)
 		goto err_free_mem;
 
 	/*