cbfstool: fix alignment to 64 byte

It's not like we _ever_ changed it, so drop the option and make cbfstool
use the default. always.

Change-Id: Ia1b99fda03d5852137a362422e979f4a4dffc5ed
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10918
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/Makefile.inc b/Makefile.inc
index 347e07b..14fa990 100644
--- a/Makefile.inc
+++ b/Makefile.inc
@@ -573,7 +573,7 @@
 
 $(obj)/coreboot.pre1: $(objcbfs)/bootblock.bin $$(prebuilt-files) $(FMAPTOOL) $(CBFSTOOL) $$(cpu_ucode_cbfs_file)
 	$(CBFSTOOL) $@.tmp create \
-	-B $(objcbfs)/bootblock.bin -a 64 \
+	-B $(objcbfs)/bootblock.bin \
 	$(CBFSTOOL_PRE1_OPTS)
 	$(prebuild-files) true
 	$(call add-cpu-microcode-to-cbfs,$@.tmp)