PCI/sysfs: Warn about BAR resize failure in __resource_resize_store()

PCI/sysfs: Warn about BAR resize failure in __resource_resize_store()

Add a pci_warn() to __resource_resize_store(), so that BAR resize failures
are visible to the user, which can help troubleshoot any potential resource
resize issues.

While at it, rename the resource_resize_is_visible() to
resource_resize_attr_is_visible() along with the corresponding group
variable to align with the naming convention used by the resource attribute
groups.

Also, change the order of pci_dev_groups[] such that the resize group is
now located alongside the other resource groups.

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://patch.msgid.link/20260508043543.217179-9-kwilczynski@kernel.org