mb/google/volteer: fw_config: Add fields for keyboard features

Add newly defined fields for presence of keyboard backlight and
number pad to the firmware configuration table.

We don't have a need to use these in coreboot (yet) but this
keeps the bit definitions in sync.

BUG=b:166707536
TEST=abuild -t google/volteer

Change-Id: I066e445f7d0be056e45737d2c538be1850ae85aa
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45346
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
index 582f44a..7b018b2 100644
--- a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
@@ -22,6 +22,14 @@
 		option LTE_ABSENT 0
 		option LTE_PRESENT 1
 	end
+	field KB_BL 14
+		option KB_BL_ABSENT 0
+		option KB_BL_PRESENT 1
+	end
+	field NUMPAD 15
+		option NUMPAD_ABSENT 0
+		option NUMPAD_PRESENT 1
+	end
 	field DB_SD 16 19
 		option SD_ABSENT 0
 		option SD_GL9755S 1