src/drivers: 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: Ib3a1cf04482a8f19b159c31cfb16a7b492748d91
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/20352
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/drivers/elog/boot_count.c

@@ -27,7 +27,7 @@
  * This can either be declared as part of the option
  * table or statically defined in the board config.
  */
-#if CONFIG_USE_OPTION_TABLE
+#if IS_ENABLED(CONFIG_USE_OPTION_TABLE)
 # include "option_table.h"
 # define BOOT_COUNT_CMOS_OFFSET (CMOS_VSTART_boot_count_offset >> 3)
 #else

src/drivers/elog/elog.c

@@ -13,13 +13,13 @@
  * GNU General Public License for more details.
  */
 
-#if CONFIG_HAVE_ACPI_RESUME == 1
+#if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)
 #include <arch/acpi.h>
 #endif
 #include <bootstate.h>
 #include <cbmem.h>
 #include <console/console.h>
-#if CONFIG_ARCH_X86
+#if IS_ENABLED(CONFIG_ARCH_X86)
 #include <pc80/mc146818rtc.h>
 #endif
 #include <bcd.h>
@@ -786,8 +786,8 @@ int elog_init(void)
 
 #if !defined(__SMM__)
 	/* Log boot count event except in S3 resume */
-#if CONFIG_ELOG_BOOT_COUNT == 1
-#if CONFIG_HAVE_ACPI_RESUME == 1
+#if IS_ENABLED(CONFIG_ELOG_BOOT_COUNT)
+#if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)
 		if (!acpi_is_wakeup_s3())
 #endif
 		elog_add_event_dword(ELOG_TYPE_BOOT, boot_count_read());
@@ -796,9 +796,9 @@ int elog_init(void)
 		elog_add_event_dword(ELOG_TYPE_BOOT, 0);
 #endif
 
-#if CONFIG_ARCH_X86
+#if IS_ENABLED(CONFIG_ARCH_X86)
 	/* Check and log POST codes from previous boot */
-	if (CONFIG_CMOS_POST)
+	if (IS_ENABLED(CONFIG_CMOS_POST))
 		cmos_post_log();
 #endif
 #endif