ntb_perf: Fix printk format

[ Upstream commit 1501ae74 ]

The correct printk format is %pa or %pap, but not %pa[p].

Fixes: 99a06056 ("NTB: ntb_perf: Fix address err in perf_copy_chunk")
Signed-off-by: Max Hawking <maxahawking@sonnenkinder.org>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Sasha Levin <sashal@kernel.org>