cpu/intel/haswell: Clean up Makefile

Group entries by stage and sort groups by stage execution order.

Change-Id: I6e2a53d6555700b48fd3aececdfdb8983554a75a
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87826
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>

src/cpu/intel/haswell/Makefile.mk

@@ -1,22 +1,21 @@
 ## SPDX-License-Identifier: GPL-2.0-only
 
-ramstage-y += haswell_init.c
+bootblock-y += bootblock.c
+bootblock-y += ../car/non-evict/cache_as_ram.S
+bootblock-y += ../car/bootblock.c
+bootblock-y += ../../x86/early_reset.S
 
 romstage-y += romstage.c
 romstage-y += ../car/romstage.c
 
+postcar-y += ../car/non-evict/exit_car.S
+
 ramstage-y += acpi.c
+ramstage-y += haswell_init.c
 ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smmrelocate.c
 
 smm-y += finalize.c
 
-bootblock-y += ../car/non-evict/cache_as_ram.S
-bootblock-y += ../car/bootblock.c
-bootblock-y += ../../x86/early_reset.S
-bootblock-y += bootblock.c
-
-postcar-y += ../car/non-evict/exit_car.S
-
 subdirs-y += ../microcode
 subdirs-y += ../turbo