staging: bcm2835-camera: Fix module section mismatch warnings.

Noticed by Stephen Rothwell in -next.

Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: 4bebb031 ("staging/bcm2835-camera: Set ourselves up as a platform driver.")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>