UPSTREAM: rowan: Fix default test HWID.

Correct the default GBB_HWID to "ROWAN TEST 9387"

BRANCH=chromeos-2016.05
BUG=b:35774871
TEST=emerge-rowan coreboot chromeos-bootimage,
            strings /build/rowan/firmware/image.bin | grep "ROWAN TEST"
            and look for 9387 in output

Change-Id: I7851010305caf056958c8a6a328b0506bf2208cd
Signed-off-by: Patrick Berny <pberny@chromium.org>
Original-Commit-Id: bf8495015495725716be04acd76d43ae6ece3c05
Original-Change-Id: I7851010305caf056958c8a6a328b0506bf2208cd
Original-Signed-off-by: Patrick Berny <pberny@chromium.org>
Original-Reviewed-on: https://review.coreboot.org/19488
Original-Tested-by: build bot (Jenkins)
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/488127
Reviewed-by: YH Lin <yueherngl@chromium.org>
diff --git a/src/mainboard/google/oak/Kconfig b/src/mainboard/google/oak/Kconfig
index d727ffc..c00c622 100644
--- a/src/mainboard/google/oak/Kconfig
+++ b/src/mainboard/google/oak/Kconfig
@@ -93,7 +93,7 @@
 	default "OAK TEST 6858" if BOARD_GOOGLE_OAK
 	default "ELM TEST 3839" if BOARD_GOOGLE_ELM
 	default "HANA TEST 5855" if BOARD_GOOGLE_HANA
-	default "ROWAN TEST 5855" if BOARD_GOOGLE_ROWAN
+	default "ROWAN TEST 9387" if BOARD_GOOGLE_ROWAN
 
 # All Oak-derivatives count their board IDs as 0 being equivalent to Oak rev6.
 config BOARD_ID_ADJUSTMENT