pinctrl: imx: Return NULL if no group is matched and found

Currently if no group is matched and found, this function will return
the last grp to the caller, this is not expected, it is supposed to
return NULL in this case.

Fixes: e566fc1 ("pinctrl: imx: use generic pinctrl helpers for managing groups")
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/20250327031600.99723-1-hui.wang@canonical.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: jason77-wang

drivers/pinctrl/freescale/pinctrl-imx.c

@@ -37,16 +37,16 @@ static inline const struct group_desc *imx_pinctrl_find_group_by_name(
 				struct pinctrl_dev *pctldev,
 				const char *name)
 {
-	const struct group_desc *grp = NULL;
+	const struct group_desc *grp;
 	int i;
 
 	for (i = 0; i < pctldev->num_groups; i++) {
 		grp = pinctrl_generic_get_group(pctldev, i);
 		if (grp && !strcmp(grp->grp.name, name))
-			break;
+			return grp;
 	}
 
-	return grp;
+	return NULL;
 }
 
 static void imx_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,