media: samsung: exynos4-is: Use %pe format specifier

The %pe format specifier is designed to print error pointers. It prints
a symbolic error name (eg. -EINVAL) and it makes the code simpler by
omitting PTR_ERR().

This patch fixes this cocci report:
./platform/samsung/exynos4-is/media-dev.c:1337:16-23: WARNING: Consider using %pe to print PTR_ERR()

Signed-off-by: Ricardo Ribalda <[e-mail]>
Acked-by: Sakari Ailus <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/platform/samsung/exynos4-is/media-dev.c

···
 
 		cp->clks[i] = clk_register(NULL, &camclk->hw);
 		if (IS_ERR(cp->clks[i])) {
-			dev_err(dev, "failed to register clock: %s (%ld)\n",
-					init.name, PTR_ERR(cp->clks[i]));
+			dev_err(dev, "failed to register clock: %s (%pe)\n",
+				init.name, cp->clks[i]);
 			ret = PTR_ERR(cp->clks[i]);
 			goto err;
 		}