s32: pcie: Lower log level for some messages

commit b43d09cc5f9038650480fa54231c5cc5ccf8ad79 from
https://source.codeaurora.org/external/autobsps32/linux



Message related to setting PCI vendor and device ID has now debug level.
Also, a check is added to inform if the register has been set correctly.

Issue: ALB-8914

Signed-off-by: Ionut Vicovan <Ionut.Vicovan@nxp.com>
Signed-off-by: Zhantao Tang <zhantao.tang@windriver.com>