mb/starlabs/starbook/cml: Enable P2SB

Enable the P2SB so that the SPI is discoverable by the OS.

Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: Ied7a6ea706e6da86182c109ab4813fa3fcebb1f8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67419
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/starlabs/starbook/variants/cml/devicetree.cb

@@ -175,7 +175,7 @@ chip soc/intel/cannonlake
 				device pnp 4e.19 off end			# Power Management Channel 5
 			end
 		end
-		device pci 1f.1 off end						# P2SB
+		device pci 1f.1 on  end						# P2SB
 		device pci 1f.2 hidden end					# Power Management Controller
 		device pci 1f.3 on						# Intel HDA
 			register "PchHdaAudioLinkHda"		= "1"