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/drivers/usb/usbhid.c

@@ -142,7 +142,7 @@ struct layout_maps {
 static const struct layout_maps *map;
 
 static const struct layout_maps keyboard_layouts[] = {
-// #if IS_ENABLED(CONFIG_LP_PC_KEYBOARD_LAYOUT_US)
+// #if CONFIG(LP_PC_KEYBOARD_LAYOUT_US)
 { .country = "us", .map = {
 	{ /* No modifier */
 	-1, -1, -1, -1, 'a', 'b', 'c', 'd',