southbridge/amd/agesa/hudson/early_setup.c: Use IS_ENABLED macro

Change-Id: I2adb5a8fe2cede988cc6fdef5ff81da86d267175
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/7624
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/southbridge/amd/agesa/hudson/early_setup.c b/src/southbridge/amd/agesa/hudson/early_setup.c
index 039df20..1b9b689 100644
--- a/src/southbridge/amd/agesa/hudson/early_setup.c
+++ b/src/southbridge/amd/agesa/hudson/early_setup.c
@@ -123,7 +123,7 @@
 	return nvram_pos;
 }
 
-#if CONFIG_HAVE_ACPI_RESUME
+#if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)
 int acpi_get_sleep_type(void)
 {
 	u16 tmp = inw(ACPI_PM1_CNT_BLK);
@@ -131,14 +131,12 @@
 	/* printk(BIOS_DEBUG, "SLP_TYP type was %x\n", tmp); */
 	return (int)tmp;
 }
-#endif
 
-#if CONFIG_HAVE_ACPI_RESUME
 int acpi_is_wakeup_early(void)
 {
 	return (acpi_get_sleep_type() == 3);
 }
-#endif
+#endif /* CONFIG_HAVE_ACPI_RESUME */
 
 unsigned long get_top_of_ram(void)
 {
@@ -153,4 +151,4 @@
 	return (unsigned long) xdata;
 }
 
-#endif
+#endif /* _HUDSON_EARLY_SETUP_C_ */