broadcom-wl: fix wild ssb_device accesses as pci_dev for legacy pci dma api

broadcom-wl driver bound to ssb device with ssb driver probe
have osh handle struct pdev pointer value initialized with
ssb_device pointer. Later on pdev is used with legacy pci
dma api as pci_dev thus causing oops sometimes.

The patch replaces legacy pci dma api and pass relevant
device struct pointer to avoid crashes.
Signed-off-by: George Kashperko <george@znau.edu.ua>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26949 3c298f89-4303-0410-b956-a3cf2f4a3e73