staging: gdm724x: Added blank lines after declarations in gdm_lte.c

This patch fixes following checkpatch.pl warning:
WARNING: Missing a blank line after declarations in gdm_lte.c

Signed-off-by: Scott Weir <sjw0410@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>