PCI: tegra: Use 'seq_puts' instead of 'seq_printf'

As spotted by checkpatch, use 'seq_puts' instead of 'seq_printf' when
possible.
It is slightly more efficient.

Link: https://lore.kernel.org/r/7bdedb342b9221169ab085540cf25d1992e8b97a.1620148539.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Vidya Sagar <vidyas@nvidia.com>