[binutils-gdb] sim: sh: fix broken handling in DSR reg

[sergiodj+buildbot@redhat.com]

*** TEST RESULTS FOR COMMIT 02131c7ff660a5ca08147899429e6e7780d737aa ***

Author: Mike Frysinger <vapier@gentoo.org>
Branch: master
Commit: 02131c7ff660a5ca08147899429e6e7780d737aa

sim: sh: fix broken handling in DSR reg
A missing */ caused a case statement to be incorrect masked out which
also hide an error where the wrong value was being checked.  Fix both.