ANDROID: fix up uio_sys_stats to handle recent proc_ops changes

proc files have their own filesystem ops type now, to make things
smaller and simpler.  Fix up this code to handle this, otherwise it
breaks the build.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I683c03a4744cb1356ba92bd5ed98adb395a3d1d5