powerpc/eeh: Use result of error_detected() in uevent

Ever since uevent support was added for AER and EEH with commit
856e1eb9 ("PCI/AER: Add uevents in AER and EEH error/resume"), it
reported PCI_ERS_RESULT_NONE as uevent when recovery begins.

Commit 7b42d97e ("PCI/ERR: Always report current recovery status for
udev") subsequently amended AER to report the actual return value of
error_detected().

Make the same change to EEH to align it with AER and s390.

Suggested-by: Lukas Wunner <lukas@wunner.de>
Link: https://lore.kernel.org/linux-pci/aIp6LiKJor9KLVpv@wunner.de/


Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Acked-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Link: https://patch.msgid.link/20250807-add_err_uevents-v5-3-adf85b0620b0@linux.ibm.com