staging: brcm80211: fixed function returns
staging: brcm80211: fixed function returns

- removed unneeded return statements at end of functions.
- changed return value of brcms_c_radio_monitor_start to void.

Reviewed-by: Pieter-Paul Giesberts <d101f7ec36e185d305862a92a05a9a0c1b62aa38@broadcom.com>
Reviewed-by: Roland Vossen <45182f14eed14f589e080b05abc22e5a7f6ee742@broadcom.com>
Reviewed-by: Arend van Spriel <06447fbe43693466d3293d0b5eaeeb2efd3d7d3a@broadcom.com>
Signed-off-by: Arend van Spriel <06447fbe43693466d3293d0b5eaeeb2efd3d7d3a@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@suse.de>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas