This patch improves the accuracy of the Cortex-A53 integer scheduler, 
resulting in performance gains across a wide range of benchmarks.

    gcc/
	* config/arm/cortex-a53.md: Use final_presence_set for in-order.
	(cortex_a53_shift): Add mov_shift.
	(cortex_a53_shift_reg): Add new reservation for register shifts.
	(cortex_a53_alu): Remove bfm.
	(cortex_a53_alu_shift): Add bfm, remove mov_shift.
	(cortex_a53_alu_extr): Add new reservation for EXTR.
	(bypasses): Improve bypass modelling.

From-SVN: r238048