Staging: vc04_services: bcm2835-camera: Remove an exceptional &

Remove an exceptional & on function names, otherwise they are used as
pointers without &.

Issue suggested using Coccinelle.

Signed-off-by: Madhumitha Prabakaran <madhumithabiw@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>