md/raid0: typedef removal: raid0_conf_t -> struct r0conf

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

diff --cc drivers/md/raid0.c
Simple merge

diff --cc drivers/md/raid0.h
Simple merge

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

diff --cc drivers/md/raid5.c
Simple merge