Staging: bcm: Bcmchar.c: Renamed variable "uiBit" -> "bit"

Renamed variable "uiBit" -> "bit" in bcm_char_ioctl_gpio_set_request().

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>