mb/google/asurada: fix boot failure when reading SKU ID

The SKU IDs also need mapping table when reading voltages.

BUG=None
BRANCH=asurada
TEST=emerge-asurada coreboot

Change-Id: Ice91961d6c33cfa27254221663edca1547c9ddcc
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51491
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/mainboard/google/asurada/boardid.c

@@ -40,6 +40,8 @@ static const unsigned int ram_voltages[ADC_LEVELS] = {
 static const unsigned int *adc_voltages[] = {
 	[RAM_ID_HIGH_CHANNEL] = ram_voltages,
 	[RAM_ID_LOW_CHANNEL] = ram_voltages,
+	[SKU_ID_HIGH_CHANNEL] = ram_voltages,
+	[SKU_ID_LOW_CHANNEL] = ram_voltages,
 };
 
 static uint32_t get_adc_index(unsigned int channel)