[PATCH] md: reformat code in raid1_end_write_request to avoid goto

A recent change made this goto unnecessary, so reformat the code to make it
clearer what is happening.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>