block: fix direct io NOWAIT flag not work

commit 8b44b4d8 ("block: don't allow multiple bios for IOCB_NOWAIT
issue") backport a upstream fix, but miss commit b77c88c2 ("block:
pass a block_device and opf to bio_alloc_kiocb"), and introduce this bug.
commit b77c88c2 ("block: pass a block_device and opf to
bio_alloc_kiocb") have other depend patch, so just fix it.

Fixes: 8b44b4d8 ("block: don't allow multiple bios for IOCB_NOWAIT issue")
Signed-off-by: Fengnan Chang <changfengnan@bytedance.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>