staging: gdm724x: fix up line lengths in the .h files

This fixes up the coding style line lengths in the .h files for this
driver.

Cc: Won Kang <wonkang@gctsemi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/gdm724x/gdm_lte.h
Simple merge

diff --cc drivers/staging/gdm724x/gdm_mux.h
Simple merge

diff --cc drivers/staging/gdm724x/gdm_tty.h
Simple merge