staging: bcm2835-camera: remove depends on ARM

Since all the arm64 specific issues have been fixed now
and the camera is working fine with a arm64 kernel, the
depends on ARM can be removed from Kconfig.

Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>