Warning removal.

Warning removal.
* config/sh/sh.c (print_operand_address): Cast INTVAL to int.
(shl_and_kind): Cast wide constant.
(gen_far_branch): Define as static, as in declaration.
(barrier_align): Compute cache-line length as unsigned.  Add
parentheses in initial credit computation.
(rounded_frame_size): Add parentheses.
(permanent_obstack): Remove declaration.  Include ggc.h for
declaration of ggc_add_root_rtx().
(get_free_reg): Removed declaration of unused variable reg.
(legitimize_pic_address): Mark mode argument as unused.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@42837 138bc75d-0d04-0410-961f-82ee72b054a4