nb/intel: add IS_ENABLED() around Kconfig symbol references

Some of these can be changed from #if to if(), but that will happen
in a follow-on commmit.

Change-Id: Id5bc8b75b1fa372f31982b8636f1efa4975b61a5
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/20346
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/northbridge/intel/sandybridge/acpi/sandybridge.asl b/src/northbridge/intel/sandybridge/acpi/sandybridge.asl
index 61537e8..609106f 100644
--- a/src/northbridge/intel/sandybridge/acpi/sandybridge.asl
+++ b/src/northbridge/intel/sandybridge/acpi/sandybridge.asl
@@ -33,7 +33,7 @@
 		Memory32Fixed(ReadWrite, 0xfed40000, 0x00005000) // Misc ICH
 		Memory32Fixed(ReadWrite, 0xfed45000, 0x0004b000) // Misc ICH
 
-#if CONFIG_CHROMEOS_RAMOOPS
+#if IS_ENABLED(CONFIG_CHROMEOS_RAMOOPS)
 		Memory32Fixed(ReadWrite, CONFIG_CHROMEOS_RAMOOPS_RAM_START,
 					 CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE)
 #endif
diff --git a/src/northbridge/intel/sandybridge/early_init.c b/src/northbridge/intel/sandybridge/early_init.c
index efe27b1..3580f35 100644
--- a/src/northbridge/intel/sandybridge/early_init.c
+++ b/src/northbridge/intel/sandybridge/early_init.c
@@ -60,7 +60,7 @@
 	pci_write_config8(PCI_DEV(0, 0x00, 0), PAM5, 0x33);
 	pci_write_config8(PCI_DEV(0, 0x00, 0), PAM6, 0x33);
 
-#if CONFIG_ELOG_BOOT_COUNT
+#if IS_ENABLED(CONFIG_ELOG_BOOT_COUNT)
 	/* Increment Boot Counter for non-S3 resume */
 	if ((inw(DEFAULT_PMBASE + PM1_STS) & WAK_STS) &&
 	    ((inl(DEFAULT_PMBASE + PM1_CNT) >> 10) & 7) != SLP_TYP_S3)
@@ -69,7 +69,7 @@
 
 	printk(BIOS_DEBUG, " done.\n");
 
-#if CONFIG_ELOG_BOOT_COUNT
+#if IS_ENABLED(CONFIG_ELOG_BOOT_COUNT)
 	/* Increment Boot Counter except when resuming from S3 */
 	if ((inw(DEFAULT_PMBASE + PM1_STS) & WAK_STS) &&
 	    ((inl(DEFAULT_PMBASE + PM1_CNT) >> 10) & 7) == SLP_TYP_S3)
diff --git a/src/northbridge/intel/sandybridge/northbridge.c b/src/northbridge/intel/sandybridge/northbridge.c
index 635e321..3c0b9ec 100644
--- a/src/northbridge/intel/sandybridge/northbridge.c
+++ b/src/northbridge/intel/sandybridge/northbridge.c
@@ -100,7 +100,7 @@
 	reserved_ram_resource(dev, index++, 0xc0000 >> 10,
 			(0x100000 - 0xc0000) >> 10);
 
-#if CONFIG_CHROMEOS_RAMOOPS
+#if IS_ENABLED(CONFIG_CHROMEOS_RAMOOPS)
 	reserved_ram_resource(dev, index++,
 			CONFIG_CHROMEOS_RAMOOPS_RAM_START >> 10,
 			CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE >> 10);
diff --git a/src/northbridge/intel/sandybridge/raminit_mrc.c b/src/northbridge/intel/sandybridge/raminit_mrc.c
index 09d82d6..3f7d1c6 100644
--- a/src/northbridge/intel/sandybridge/raminit_mrc.c
+++ b/src/northbridge/intel/sandybridge/raminit_mrc.c
@@ -39,7 +39,7 @@
  * MRC scrambler seed offsets should be reserved in
  * mainboard cmos.layout and not covered by checksum.
  */
-#if CONFIG_USE_OPTION_TABLE
+#if IS_ENABLED(CONFIG_USE_OPTION_TABLE)
 #include "option_table.h"
 #define CMOS_OFFSET_MRC_SEED     (CMOS_VSTART_mrc_scrambler_seed >> 3)
 #define CMOS_OFFSET_MRC_SEED_S3  (CMOS_VSTART_mrc_scrambler_seed_s3 >> 3)
@@ -236,7 +236,7 @@
 		die("UEFI PEI System Agent not found.\n");
 	}
 
-#if CONFIG_USBDEBUG_IN_ROMSTAGE
+#if IS_ENABLED(CONFIG_USBDEBUG_IN_ROMSTAGE)
 	/* mrc.bin reconfigures USB, so reinit it to have debug */
 	usbdebug_init();
 #endif