mb/google/brya/var/brask: Enable LAN driver to program MAC

Turn on the LAN device in devicetree and add Kconfig item
RT8168_GET_MAC_FROM_VPD to support programming MAC address.

BUG=b:193750191
BRANCH=None
TEST=Use 'vpd -s ethernet_mac0=...' to write MAC to VPD.
     Use 'ifconfig' to check if the MAC written successfully.

Signed-off-by: Alan Huang <alan-huang@quanta.corp-partner.google.com>
Change-Id: Ibb95b02fd6d61621ef46db4d63b48456a0a72732
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59087
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/mainboard/google/brya/Kconfig

@@ -8,6 +8,7 @@ config BOARD_GOOGLE_BASEBOARD_BRASK
 	def_bool n
 	select SPD_CACHE_IN_FMAP
 	select ENABLE_TCSS_DISPLAY_DETECTION if RUN_FSP_GOP
+	select RT8168_GET_MAC_FROM_VPD
 
 if BOARD_GOOGLE_BASEBOARD_BRYA || BOARD_GOOGLE_BASEBOARD_BRASK
 

src/mainboard/google/brya/variants/brask/overridetree.cb

@@ -79,6 +79,11 @@ chip soc/intel/alderlake
 				device generic 0 alias dptf_policy on end
 			end
 		end
+		device ref pcie_rp7 on
+			chip drivers/net
+				device pci 00.0 on end
+			end
+		end # RTL8125 Ethernet NIC
 		device ref pcie4_0 on
 			# Enable CPU PCIE RP 1 using CLK 0
 			register "cpu_pcie_rp[CPU_RP(1)]" = "{