mb/kontron/986lcd-m: Use ''PNP_IDX_*' instead of magic numbers

Change-Id: Ic7c1b4defa8c65ed739b1cf3861087cd53cd997c
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44838
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/mainboard/kontron/986lcd-m/early_init.c b/src/mainboard/kontron/986lcd-m/early_init.c
index 37bb968..9022198 100644
--- a/src/mainboard/kontron/986lcd-m/early_init.c
+++ b/src/mainboard/kontron/986lcd-m/early_init.c
@@ -63,7 +63,7 @@
 	dev = PNP_DEV(0x2e, W83627THG_GAME_MIDI_GPIO1);
 	pnp_set_logical_device(dev);
 	pnp_set_enable(dev, 0);
-	pnp_write_config(dev, 0xf5, 0xff); /* invert all GPIOs */
+	pnp_write_config(dev, PNP_IDX_MSC5, 0xff); /* invert all GPIOs */
 	pnp_set_enable(dev, 1);
 
 	dev = PNP_DEV(0x2e, W83627THG_GPIO2);
@@ -73,9 +73,10 @@
 	dev = PNP_DEV(0x2e, W83627THG_GPIO3);
 	pnp_set_logical_device(dev);
 	pnp_set_enable(dev, 0);
-	pnp_write_config(dev, 0xf0, 0xfb); /* GPIO bit 2 is output */
-	pnp_write_config(dev, 0xf1, 0x00); /* GPIO bit 2 is 0 */
-	pnp_write_config(dev, 0x30, 0x03); /* Enable GPIO3+4. pnp_set_enable is not sufficient */
+	pnp_write_config(dev, PNP_IDX_MSC0, 0xfb); /* GPIO bit 2 is output */
+	pnp_write_config(dev, PNP_IDX_MSC1, 0x00); /* GPIO bit 2 is 0 */
+	/* Enable GPIO3+4. pnp_set_enable is not sufficient */
+	pnp_write_config(dev, PNP_IDX_EN, 0x03);
 
 	dev = PNP_DEV(0x2e, W83627THG_FDC);
 	pnp_set_logical_device(dev);