b43: bus: abstract SPROM

SPROM is another frequently used struct. We decided to share SPROM
struct between ssb na bcma as long as we will not need any hacks.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/bus.c b/drivers/net/wireless/b43/bus.c
index be3d206..c116f12 100644
--- a/drivers/net/wireless/b43/bus.c
+++ b/drivers/net/wireless/b43/bus.c
@@ -70,6 +70,8 @@
 	dev->block_read = b43_bus_ssb_block_read;
 	dev->block_write = b43_bus_ssb_block_write;
 
+	dev->bus_sprom = &sdev->bus->sprom;
+
 	dev->core_id = sdev->id.coreid;
 	dev->core_rev = sdev->id.revision;