pinctrl: imx: output one pin/config pair per line in pinconf-groups

cat /sys/kernel/debug/pinctrl/${pinctrl}/pinconf-groups output is
hardly readable, if a pin group contains more than one pin the output
is glued and looks like this:

  MX6Q_PAD_SD1_DAT0: 0x17071MX6Q_PAD_SD1_CMD: 0x17071MX6Q_PAD_SD1_CLK: 0x17071

Add two space indentation and a new line separator to improve
readability of the output.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/freescale/pinctrl-imx.c

@@ -501,7 +501,7 @@ static void imx_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
 		ret = imx_pinconf_get(pctldev, pin->pin, &config);
 		if (ret)
 			return;
-		seq_printf(s, "%s: 0x%lx", name, config);
+		seq_printf(s, "  %s: 0x%lx\n", name, config);
 	}
 }