Add target_ops argument to to_remove_watchpoint

Add target_ops argument to to_remove_watchpoint

2014-02-19  Tom Tromey  <tromey@redhat.com>

	* target.h (struct target_ops) <to_remove_watchpoint>: Add
	argument.
	(target_remove_watchpoint): Add argument.
	* target.c (debug_to_remove_watchpoint): Add argument.
	(update_current_target): Update.
	* s390-linux-nat.c (s390_remove_watchpoint): Add 'self' argument.
	* remote.c (remote_remove_watchpoint): Add 'self' argument.
	* remote-mips.c (mips_remove_watchpoint): Add 'self' argument.
	* remote-m32r-sdi.c (m32r_remove_watchpoint): Add 'self' argument.
	* procfs.c (procfs_remove_watchpoint): Add 'self' argument.
	* ppc-linux-nat.c (ppc_linux_remove_watchpoint): Add 'self'
	argument.
	* nto-procfs.c (procfs_remove_hw_watchpoint): Add 'self' argument.
	* mips-linux-nat.c (mips_linux_remove_watchpoint): Add 'self'
	argument.
	* inf-ttrace.c (inf_ttrace_remove_watchpoint): Add 'self'
	argument.
	* ia64-linux-nat.c (ia64_linux_remove_watchpoint): Add 'self'
	argument.
	* i386-nat.c (i386_remove_watchpoint): Add 'self' argument.
	* arm-linux-nat.c (arm_linux_remove_watchpoint): Add 'self'
	argument.
	* aarch64-linux-nat.c (aarch64_linux_remove_watchpoint): Add
	'self' argument.