brcmfmac: dump dongle memory when attaching failed

To enhance FW debugging, we add dongle memory dump when hitting attaching
failure with PCIE bus. It can help developer to get more information
about dongle trap reason and root cause.

Signed-off-by: Wright Feng <wright.feng@cypress.com>
Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Ian Lin <ian.lin@infineon.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220929031001.9962-4-ian.lin@infineon.com