[AARCH64] Refactor constant generation.

[AARCH64] Refactor constant generation.

2012-12-03  Sofiane Naci  <sofiane.naci@arm.com>

	* config/aarch64/aarch64.c (aarch64_build_constant): Update prototype.
	Call emit_move_insn	instead of printing movi/movn/movz instructions.
	Call gen_insv_immdi instead of printing movk instruction.
	(aarch64_add_constant): Update prototype.
	Generate RTL instead of printing add/sub instructions.
	(aarch64_output_mi_thunk): Update calls to aarch64_build_constant
	and aarch64_add_constant.

From-SVN: r194080