ata: sata_sx4: Drop pointless VPRINTK() calls and convert the remaining ones

[ Upstream commit bc21c105 ]

Drop pointless VPRINTK() calls for setting up SG tables
and convert the remaining calls to structured logging.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Stable-dep-of: 8d46a270 ("ata: sata_sx4: Add error handling in pdc20621_i2c_read()")
Signed-off-by: Sasha Levin <sashal@kernel.org>