[PATCH revert]Revert r212892 and r212893

["Bin Cheng" <bin dot cheng at arm dot com>]

Hi,
I reverted my patches about inlining memset on arm, it can't build glibc
properly.  I will try to resolve the issue.
Sorry for the inconvenience.

	Revert r212893:
	PR target/55701
	* config/arm/arm.md (setmem): New pattern.
	* config/arm/arm-protos.h (struct tune_params): New fields.
	(arm_gen_setmem): New prototype.
	* config/arm/arm.c (arm_slowmul_tune): Initialize new fields.
	(arm_fastmul_tune, arm_strongarm_tune, arm_xscale_tune): Ditto.
	(arm_9e_tune, arm_v6t2_tune, arm_cortex_tune): Ditto.
	(arm_cortex_a8_tune, arm_cortex_a7_tune): Ditto.
	(arm_cortex_a15_tune, arm_cortex_a53_tune): Ditto.
	(arm_cortex_a57_tune, arm_cortex_a5_tune): Ditto.
	(arm_cortex_a9_tune, arm_cortex_a12_tune): Ditto.
	(arm_v7m_tune, arm_v6m_tune, arm_fa726te_tune): Ditto.
	(arm_const_inline_cost): New function.
	(arm_block_set_max_insns): New function.
	(arm_block_set_non_vect_profit_p): New function.
	(arm_block_set_vect_profit_p): New function.
	(arm_block_set_unaligned_vect): New function.
	(arm_block_set_aligned_vect): New function.
	(arm_block_set_unaligned_non_vect): New function.
	(arm_block_set_aligned_non_vect): New function.
	(arm_block_set_vect, arm_gen_setmem): New functions.

	PR target/55701
	* gcc.target/arm/memset-inline-1.c: New test.
	* gcc.target/arm/memset-inline-2.c: New test.
	* gcc.target/arm/memset-inline-3.c: New test.
	* gcc.target/arm/memset-inline-4.c: New test.
	* gcc.target/arm/memset-inline-5.c: New test.
	* gcc.target/arm/memset-inline-6.c: New test.
	* gcc.target/arm/memset-inline-7.c: New test.
	* gcc.target/arm/memset-inline-8.c: New test.
	* gcc.target/arm/memset-inline-9.c: New test.

	Revert r212892:
	* config/arm/arm.c (output_move_neon): Handle REG explicitly.

Thanks,
bin