simplify tic54x_set_default_include ()

its only called with an argument of 0, so we might as well remove the code
supporting other values.

gas/ChangeLog:

2016-06-25  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* config/tc-tic54x.c (tic54x_set_default_include): remove argument
							   and simplify accordingly.
	(tic54x_include): Adjust.
	(tic54x_mlib): Likewise.
2 files changed