Revert "pinctrl: digicolor: add missing platform_set_drvdata() call"

This reverts commit 8b2b3dcb343bf8cb62efc1bd6a9dbe850005e2ac.

Commit 546c6d79301 (pinctrl: digicolor: make it explicitly non-modular) removed
the platform_get_drvdata() call, so platform_set_drvdata() is no longer needed.

Cc: Masahiro Yamada <[e-mail]>
Cc: Paul Gortmaker <[e-mail]>
Signed-off-by: Baruch Siach <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/pinctrl-digicolor.c

···
 		return PTR_ERR(pmap->pctl);
 	}
 
-	platform_set_drvdata(pdev, pmap);
-
 	return dc_gpiochip_add(pmap, pdev->dev.of_node);
 }