mb/purism/librem_bdw: Use Haswell CPU code

Change-Id: I736bff90305952d279a10dfe90a2ee3a533220b5
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46948
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/purism/librem_bdw/Kconfig

@@ -1,5 +1,6 @@
 config BOARD_PURISM_BASEBOARD_LIBREM_BDW
 	def_bool n
+	select CPU_INTEL_HASWELL
 	select SYSTEM_TYPE_LAPTOP
 	select BOARD_ROMSIZE_KB_8192
 	select HAVE_ACPI_RESUME

src/mainboard/purism/librem_bdw/devicetree.cb

@@ -16,7 +16,10 @@ chip soc/intel/broadwell
 	}"
 
 	device cpu_cluster 0 on
+		chip cpu/intel/haswell
 			device lapic 0 on end
+			device lapic 0xacac off end
+		end
 	end
 	device domain 0 on
 		device pci 00.0 on  end # host bridge