migration: move buffered_file.c code into migration.c

This only moves the code (also from buffered_file.h to migration.h).
Fix whitespace until checkpatch is happy.

Signed-off-by: Juan Quintela <quintela@redhat.com>
diff --git a/Makefile.objs b/Makefile.objs
index a637a4a..4ef0a71 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -77,7 +77,8 @@
 extra-obj-$(CONFIG_LINUX) += fsdev/
 
 common-obj-y += tcg-runtime.o host-utils.o main-loop.o
-common-obj-y += buffered_file.o migration.o migration-tcp.o
+common-obj-y += migration.o migration-tcp.o
+common-obj-y += migration.o migration-tcp.o
 common-obj-y += qemu-char.o #aio.o
 common-obj-y += block-migration.o iohandler.o
 common-obj-y += bitmap.o bitops.o