md: remove typedefs: r10bio_t -> struct r10bio and r1bio_t -> struct r1bio

Signed-off-by: NeilBrown <neilb@suse.de>

diff --cc drivers/md/raid1.c
Simple merge

diff --cc drivers/md/raid1.h
Simple merge

diff --cc drivers/md/raid10.c
Simple merge

diff --cc drivers/md/raid10.h
Simple merge