mb/google/brya/variants/redrix: enable LTE PCIe port

Enable LTE PCIe port according to fw config.

BUG=b:192052098
TEST=emerge-brya coreboot chromeos-bootimage

Change-Id: Ic9472d2249c622858a75c63bc82e8e4e8166a3d7
Signed-off-by: Wisley Chen <wisley.chen@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56894
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

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

@@ -142,6 +142,9 @@ chip soc/intel/alderlake
 				device generic 0 on end
 			end
 		end
+		device ref pcie_rp6 on
+			probe DB_LTE LTE_PCIE
+		end
 		device ref tcss_dma0 on
 			chip drivers/intel/usb4/retimer
 				register "dfp[0].power_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_E4)"