Linux 5.18 compat: 4-argument bio_alloc()

bio_alloc(gfp_t gfp_mask, unsigned short nr_iovecs)

became

bio_alloc(struct block_device *bdev, unsigned short nr_vecs,
          unsigned int opf, gfp_t gfp_mask)

passing NULL/0 continues previous behaviour

Upstream-commit: 07888c665b405b1cd3577ddebfeb74f4717a84c4 ("block:
pass a block_device and opf to bio_alloc")

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13251