make brcm47xx build only with bcma or only with ssb support.

There are some ifdefs missing so when only ssb or only bcma was
selected in the kernel config it did not build.

SVN-Revision: 33209

target/linux/brcm47xx/patches-3.3/502-bcm47xx-rewrite-gpio-handling.patch

@@ -272,7 +272,7 @@
 +EXPORT_SYMBOL(gpio_set_value);
 --- a/arch/mips/bcm47xx/setup.c
 +++ b/arch/mips/bcm47xx/setup.c
-@@ -344,6 +344,8 @@ void __init plat_mem_setup(void)
+@@ -345,6 +345,8 @@ void __init plat_mem_setup(void)
  	_machine_restart = bcm47xx_machine_restart;
  	_machine_halt = bcm47xx_machine_halt;
  	pm_power_off = bcm47xx_machine_halt;