mb, soc/intel: Switch to using drivers/wifi/generic for Intel WiFi devices

This change switches all mainboard devices to use drivers/wifi/generic
instead of drivers/intel/wifi chip driver for Intel WiFi
devices. There is no need for two separate chip drivers in coreboot to
handle Intel and non-Intel WiFi devices since the differences can be
handled at runtime using the PCI vendor ID. This also allows mainboard
to easily multi-source WiFi chips and still use the same firmware
image without having to distinguish between the chip drivers.

BUG=b:169802515
BRANCH=zork

Change-Id: Ieac603a970cb2c9bf835021d1fb0fd07fd535280
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46035
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

src/mainboard/clevo/cml-u/variants/l140cu/devicetree.cb

@@ -89,7 +89,7 @@ chip soc/intel/cannonlake
 			register "usb3_ports[2]" = "USB3_PORT_DEFAULT(OC_SKIP)"		# Type-A port 3
 		end
 		device pci 14.1 off end # USB xDCI (OTG)
-		chip drivers/intel/wifi # CNVi wifi
+		chip drivers/wifi/generic # CNVi wifi
 			register "wake" = "GPE0_PME_B0"
 			device pci 14.3 on end
 		end
@@ -141,7 +141,7 @@ chip soc/intel/cannonlake
 		end
 		device pci 1c.6 off end # PCI Express Port 7
 		device pci 1c.7 on	# PCI Express Port 8
-			chip drivers/intel/wifi
+			chip drivers/wifi/generic
 				device pci 00.0 on end	# x1 M.2/E 2230 (J_WLAN1)
 			end
 			register "PcieRpEnable[7]" = "1"