mb/portwell/m107: Remove direct 'include <soc/gpio.h>'

Don't directly include <soc/gpio.h>. All code using GPIO features
should always and only include <gpio.h>, which should indirectly
include the SoC-specific <soc/gpio.h>.

Change-Id: I78f1e250570f1b395c61115d4a872b24b3d58f69
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41323
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-by: Wim Vervoorn <wvervoorn@eltan.com>

src/mainboard/portwell/m107/gpio.c

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <soc/gpio.h>
+#include <gpio.h>
 
 /* South East Community */
 static const struct soc_gpio_map gpse_gpio_map[] = {