payloads: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX)

This patch is a raw application of

 find payloads/ -type f | \
   xargs sed -i -e 's/IS_ENABLED\s*(CONFIG_/CONFIG(/g'

Change-Id: I883b03b189f59b5d998a09a2596b0391a2d5cf33
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31775
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

payloads/libpayload/arch/x86/sysinfo.c

@@ -40,7 +40,7 @@
  */
 struct sysinfo_t lib_sysinfo = {
 	.cpu_khz = CPU_KHZ_DEFAULT,
-#if IS_ENABLED(CONFIG_LP_SERIAL_CONSOLE)
+#if CONFIG(LP_SERIAL_CONSOLE)
 	.ser_ioport = CONFIG_LP_SERIAL_IOBASE,
 #else
 	.ser_ioport = 0x3f8,
@@ -51,7 +51,7 @@ int lib_get_sysinfo(void)
 {
 	int ret;
 
-#if IS_ENABLED(CONFIG_LP_MULTIBOOT)
+#if CONFIG(LP_MULTIBOOT)
 	/* Get the information from the multiboot tables,
 	 * if they exist */
 	get_multiboot_info(&lib_sysinfo);