soc/intel/apollolake: Simplify is-device-enabled checks

Simplify if-statements and use is_dev_enabled() where possible.

Change-Id: Ieeec987dc2bfe5bdef31882edbbb36e52f63b0e6
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43899
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Michael Niewöhner
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/apollolake/acpi.c b/src/soc/intel/apollolake/acpi.c
index 16f6090..96a142a 100644
--- a/src/soc/intel/apollolake/acpi.c
+++ b/src/soc/intel/apollolake/acpi.c
@@ -4,6 +4,7 @@
 #include <acpi/acpi_gnvs.h>
 #include <acpi/acpigen.h>
 #include <console/console.h>
+#include <device/device.h>
 #include <device/mmio.h>
 #include <arch/smp/mpspec.h>
 #include <assert.h>
@@ -170,7 +171,7 @@
 	unsigned long tmp;
 
 	/* IGD has to be enabled, GFXVTBAR set and enabled. */
-	if (igfx_dev && igfx_dev->enabled && gfxvtbar && gfxvten) {
+	if (is_dev_enabled(igfx_dev) && gfxvtbar && gfxvten) {
 		tmp = current;
 
 		current += acpi_create_dmar_drhd(current, 0, 0, gfxvtbar);