vendorcode/google/chromeos: Correct VPD field for MAC passthrough

The VPD field name is dock_passthrough, not dock_passthru. Fix it.

(I assume there is no length limit)

BUG=b:132689337
TEST=check that the feature can now be controlled by the associated
enterprise policy

Change-Id: Icc2b070313fde74447279cd6ccaa4e3eb6d119ee
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32839
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/vendorcode/google/chromeos/acpi/amac.asl b/src/vendorcode/google/chromeos/acpi/amac.asl
index c87862f..5a091dd 100644
--- a/src/vendorcode/google/chromeos/acpi/amac.asl
+++ b/src/vendorcode/google/chromeos/acpi/amac.asl
@@ -16,16 +16,17 @@
 
 /*
  * The Realtek r8152 driver in the Linux kernel supports a MAC address
- * passthru feature which can result in the dock ethernet port using the
- * same MAC address that is assigned to the internal NIC.  This is done
- * by calling an ACPI method at \_SB.AMAC() which returns a formatted
- * string (as a buffer) containing the MAC address for the dock to use.
+ * dock pass-through feature which can result in the dock ethernet port
+ * using the same MAC address that is assigned to the internal NIC.  This
+ * is done by calling an ACPI method at \_SB.AMAC() which returns a
+ * formatted string (as a buffer) containing the MAC address for the
+ * dock to use.
  *
  * The Linux kernel implementation can be found at
  * drivers/net/usb/r8152.c:vendor_mac_passthru_addr_read()
  *
  * For Chrome OS, the policy which controls where the dock MAC address
- * comes from is written into RW_VPD property "dock_passthru":
+ * comes from is written into RW_VPD property "dock_passthrough":
  *
  *   "dock_mac" or empty: Use MAC address from RO_VPD value "dock_mac"
  *   "ethernet_mac0": Use MAC address from RO_VPD value "ethernet_mac0"
@@ -39,8 +40,8 @@
 		/* Format expected by the Linux kernel r8152 driver */
 		Name (MACA, "_AUXMAC_#XXXXXXXXXXXX#")
 
-		/* Get "dock_passthru" value from RW_VPD */
-		Local0 = \VPD.VPDF ("RW", "dock_passthru")
+		/* Get "dock_passthrough" value from RW_VPD */
+		Local0 = \VPD.VPDF ("RW", "dock_passthrough")
 
 		Local1 = Zero
 		Switch (ToString (Local0))