bcma: add early_init function for PCIe core and move some fix into it

There are some PCIe core fixes that need to be applied before accessing
SPROM, otherwise reading it may fail.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --cc drivers/bcma/driver_pci.c
Simple merge

diff --cc drivers/bcma/main.c
Simple merge

diff --cc include/linux/bcma/bcma_driver_pci.h
Simple merge