pinctrl: core: Do not add device links for hogs

Hogs would create circular device links, so do not link
the device to itself.

Cc: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/core.c

@@ -1271,6 +1271,8 @@ static int pinctrl_commit_state(struct pinctrl *p, struct pinctrl_state *state)
 			goto unapply_new_state;
 		}
 
+		/* Do not link hogs (circular dependency) */
+		if (p != setting->pctldev->p)
 			pinctrl_link_add(setting->pctldev, p->dev);
 	}