The wdog1 pinctrl got fixed with linux upstream commit 213e51ca8df1 ("ARM:
dts: imx7: Add "LPSR" to LPSR iomux pin names").
Remove the old workaround, since it triggers a build error.
Signed-off-by: Alexander Kurz <akurz@blala.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>