General tidying up of commenting and naming.

2013-01-30  Jeremy Bennett <jeremy.bennett@embecosm.com>

	* arc-linux-tdep.c: General tidy up of commenting.
	(arc_linux_core_reg_offsets): Renamed from
	arcompact_linux_core_reg_offsets.
	(arc_linux_binutils_reg_to_regnum): Moved to start of file to
	avoid need for forward declaration. Renamed from
	binutils_reg_to_regnum.
	(arc_linux_next_pc): Renamed from next_pc. Move declarations of
	lp_end, lp_start, lp_count and status32 to start of function.
	(arc_linux_supply_gregset): Renamed from
	arcompact_linux_supply_gregset and merged with supply_gregset.
	(supply_gregset): Merged into arc_linux_supply_gregset.
	(arc_linux_is_sigtramp): Renamed from is_linux_sigtramp.
	(arc_linux_sigcontext_addr): Renamed from linux_sigcontext_addr.
	(arc_linux_register_reggroup_p): Renamed from register_reggroup_p.
	(arc_linux_pseudo_register_read): Restructured.
	(arc_linux_regset_from_core_section): Define arch field.
	(arc_linux_init_abi): Tidied up code.