* target.h (struct target_ops): Add REGCACHE parameter to

	* target.h (struct target_ops): Add REGCACHE parameter to
	to_prepare_to_store.
	(target_prepare_to_store): Likewise.
	* target.c (debug_to_prepare_to_store): Add REGCACHE parameter.
	(update_current_target): Adapt prepare_to_store de_fault rule.

	* regcache.c (regcache_raw_write): Pass regcache to
	target_prepare_to_store.

	* inftarg.c (child_prepare_to_store): Add REGCACHE parameter.
	Do not call CHILD_PREPARE_TO_STORE.
	* gnu-nat.c (gnu_prepare_to_store): Likewise.
	* procfs.c (procfs_prepare_to_store): Likewise.

	* inf-child.c (inf_child_prepare_to_store): Add REGCACHE parameter.
	* go32-nat.c (go32_prepare_to_store): Likewise.
	* monitor.c (monitor_prepare_to_store): Likewise.
	* nto-procfs.c (procfs_prepare_to_store): Likewise.
	* remote-m32r-sdi.c (m32r_prepare_to_store): Likewise.
	* remote-mips.c (mips_prepare_to_store): Likewise.
	* remote-sim.c (gdbsim_prepare_to_store): Likewise.
	* win32-nat.c (win32_prepare_to_store): Likewise.

	* remote.c (remote_prepare_to_store): Add REGCACHE parameter.
	Use it instead of current_regcache.

	* hpux-thread.c (hpux_thread_prepare_to_store): Add REGCACHE
	parameter.  Pass it on to next target.
	* sol-thread.c (sol_thread_prepare_to_store): Likewise.