Partially revert 4be83cc2b28ea09aa8ff789839e6520df60836f8

Partially revert 4be83cc2b28ea09aa8ff789839e6520df60836f8

The above commit did two things:

 1) A number of functions were renamed and made nonstatic.
 2) A number of other functions were renamed only.

This commit reverts #1 but not #2.  In addition, prototypes for
functions now remade static have been removed from i386-dregs.h.

gdb/
2014-06-19  Gary Benson  <gbenson@redhat.com>

	* i386-nat.c (i386_dr_show): Renamed to
	i386_show_dr and made static.  All uses updated.
	(i386_dr_length_and_rw_bits): Renamed to
	i386_length_and_rw_bits and made static.
	All uses updated.
	(i386_dr_insert_aligned_watchpoint): Renamed to
	i386_insert_aligned_watchpoint and made static.
	All uses updated.
	(i386_dr_remove_aligned_watchpoint): Renamed to
	i386_remove_aligned_watchpoint and made static.
	All uses updated.
	(i386_dr_update_inferior_debug_regs): Renamed to
	i386_update_inferior_debug_regs and made static.
	All uses updated.
	* nat/i386-dregs.h (i386_dr_show): Removed.
	(i386_dr_length_and_rw_bits): Likewise.
	(i386_dr_insert_aligned_watchpoint): Likewise.
	(i386_dr_remove_aligned_watchpoint): Likewise.
	(i386_dr_update_inferior_debug_regs): Likewise.

gdb/gdbserver/
2014-06-19  Gary Benson  <gbenson@redhat.com>

	* i386-low.c (i386_dr_show): Renamed to
	i386_show_dr and made static.  All uses updated.
	(i386_dr_length_and_rw_bits): Renamed to
	i386_length_and_rw_bits and made static.
	All uses updated.
	(i386_dr_insert_aligned_watchpoint): Renamed to
	i386_insert_aligned_watchpoint and made static.
	All uses updated.
	(i386_dr_remove_aligned_watchpoint): Renamed to
	i386_remove_aligned_watchpoint and made static.
	All uses updated.
	(i386_dr_update_inferior_debug_regs): Renamed to
	i386_update_inferior_debug_regs and made static.
	All uses updated.