b43: make B43_PCMCIA and B43_SDIO depend on B43_SSB

These are extra configs specific to the SSB. Lack of this dependency and
CONFIG_B43=y
CONFIG_B43_BUSES_BCMA=y
CONFIG_SSB=m
would result in:
> drivers/built-in.o: In function `b43_sdio_remove':
> sdio.c:(.text+0x14657f): undefined reference to `ssb_bus_unregister'
> drivers/built-in.o: In function `b43_sdio_probe':
> sdio.c:(.text+0x14672f): undefined reference to `ssb_bus_sdiobus_register'
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/Kconfig

@@ -73,7 +73,7 @@ config B43_PCICORE_AUTOSELECT
 
 config B43_PCMCIA
 	bool "Broadcom 43xx PCMCIA device support"
-	depends on B43 && SSB_PCMCIAHOST_POSSIBLE
+	depends on B43 && B43_SSB && SSB_PCMCIAHOST_POSSIBLE
 	select SSB_PCMCIAHOST
 	---help---
 	  Broadcom 43xx PCMCIA device support.
@@ -93,7 +93,7 @@ config B43_PCMCIA
 
 config B43_SDIO
 	bool "Broadcom 43xx SDIO device support"
-	depends on B43 && SSB_SDIOHOST_POSSIBLE
+	depends on B43 && B43_SSB && SSB_SDIOHOST_POSSIBLE
 	select SSB_SDIOHOST
 	---help---
 	  Broadcom 43xx device support for Soft-MAC SDIO devices.