Arm: Prefix register sizes with ARM_

Arm: Prefix register sizes with ARM_

Add ARM_ to the front of INT_REGISTER_SIZE, FP_REGISTER_SIZE and
ARM_VFP_REGISTER_SIZE to make it obvious they are for the Arm target.
Move the defines to arch/arm.h

No functionality changes.

gdb/ChangeLog:

	* arch/arm-get-next-pcs.c (thumb_get_next_pcs_raw): Use ARM_
	defines.
	* arch/arm-linux.c (arm_linux_sigreturn_next_pc_offset): Likewise.
	* arch/arm.h (INT_REGISTER_SIZE) Rename from...
	(ARM_INT_REGISTER_SIZE): ...to this.
	(ARM_FP_REGISTER_SIZE) (ARM_VFP_REGISTER_SIZE): Add define.
	* arm-linux-tdep.c (ARM_LINUX_JB_ELEMENT_SIZE)
	(ARM_LINUX_SIZEOF_GREGSET, arm_linux_supply_gregset)
	(arm_linux_collect_gregset, supply_nwfpe_register)
	(collect_nwfpe_register, arm_linux_collect_nwfpe): Use ARM_
	defines.
	* arm-linux-tdep.h (ARM_LINUX_SIZEOF_NWFPE, NWFPE_FPSR_OFFSET)
	(NWFPE_FPCR_OFFSET, NWFPE_TAGS_OFFSET): Likewise
	* arm-nbsd-tdep.c (ARM_NBSD_JB_ELEMENT_SIZE): Likewise.
	* arm-tdep.c (arm_push_dummy_call, arm_extract_return_value)
	(arm_return_in_memory, arm_store_return_value)
	(arm_get_longjmp_target, arm_register_g_packet_guesses)
	(arm_record_ld_st_multiple): Likewise.
	* arm-tdep.h (FP_REGISTER_SIZE, VFP_REGISTER_SIZE): Remove.
	* arm-wince-tdep.c (ARM_WINCE_JB_ELEMENT_SIZE): Use ARM_ defines.