sparc64: switch genregs32_get() to use of get_from_target()

... for fetching the register window from target's stack, rather
than open-coding it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2020-05-22 12:51:42 -04:00
commit 030754c995