No set_gdbarch_* functions for hardware watchpoints

[Kei Sakamoto]

Hello,

I'm implementing hardware watchpoints for m32r target and
I found that there was no set_gdbarch_* functions for hardware
watchpoints.

I can use macros instead of set_gdbarch_* functions like other
targets, but it means m32r target becomes MULTI_ARCH_PARTIAL.
I don't think it's a good implementation.

Would anyone add set_gdbarch_* functions for hardware watchpoints?

===
Kei Sakamoto
Renesas Technology Corp.
sakamoto.kei@renesas.com