h/w watchpoint pointer initialization patch.

Hi,
While debugging cvs gdb, I put a h/w watch point, when this watch point
hits gdb calls target_insert_watchpoint macro. This macro definition is
present in target.h as bellow: 

        #define target_insert_watchpoint(addr, len, type)       \
             (*current_target.to_insert_watchpoint) (addr, len, type)

In case of remote debugging *current_target.to_insert_watchpoint points
to remote_target_insert_watchpoint function, but while native debugging
it should points to <host_arch>_insert_watchpoint (e.g.
i386_insert_watchpoint) instead it points to return_minus_one function.

This patch removes declaration of macros in file gdb/config/i386/nm-
i386.h for insertion and removal of h/w watchpoints. Instead it
initializes register access methods in  gdb/i386-linux-nat.c file.
That fixes the above problem.
I have committed this patch at
gdb/hw_watchpt_pointer_initialization.patch.

thanks
- Jitendra

hw_watchpt_pointer_initialization.patch
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