atomisp: remove dependencies from AtomISP to subdevice drivers

atomisp: remove dependencies from AtomISP to subdevice drivers

BZ: 27473

Enabling AtomISP used to select also all sensor drivers in
the Kconfig. There is no point compiling all sensor drivers
for all platforms, so remove this dependency.

Change-Id: I44255cd33d3e4562841c083f6b6492d99b7fe8c2
Signed-off-by: Tuukka Toivonen <tuukka.toivonen@intel.com>
Reviewed-on: http://android.intel.com:8080/42097
Reviewed-by: Koski, Anttu <anttu.koski@intel.com>
Tested-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: Shevchenko, Andriy <andriy.shevchenko@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>