staging: dgrp: remove use of real_raw and read_cnt in dgrp_input
staging: dgrp: remove use of real_raw and read_cnt in dgrp_input

dgrp_input used real_raw and read_cnt from struct tty_struct.  Those
members have gone away.  Rework the code to not use them.

Reported-by: Fengguang Wu <24f7fe9d205c8a9f6ade0c2894e14303ca16087f@intel.com>
Signed-off-by: Bill Pemberton <6208e3c588e4690c7dfac5e95777d6a902c5fb27@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs