google/kukui: Complete board ID ADC values

The ID from ADC on Kukui supports 16 different values and we should list
all voltage values ahead.

BUG=b:80501386
TEST=make; manually verified on Kukui P1

Change-Id: Ic3abe07abfe818ca68e180c262fd431d1167b801
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/c/30619
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: You-Cheng Syu <youcheng@google.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/mainboard/google/kukui/boardid.c

@@ -34,7 +34,10 @@ static uint32_t get_index(unsigned int channel, uint32_t *cached_id)
 	/*  9 : */ 1137000,
 	/* 10 : */ 1240000,
 	/* 11 : */ 1343000,
-	/* 12 : */ 1457000
+	/* 12 : */ 1457000,
+	/* 13 : */ 1576000,
+	/* 14 : */ 1684000,
+	/* 15 : */ 1800000,
 	};
 
 	uint32_t id;