Use PCI_POSSIBLE_ERROR() to check the response we get when we read data
from hardware.  This unifies PCI error response checking and makes error
checks consistent and easier to find.

Link: https://lore.kernel.org/r/20240806065050.28725-1-412574090@163.comSigned-off-by: weiyufeng <weiyufeng@kylinos.cn>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>