[POWERPC] Update pseries defconfig

pseries defconfig updates:

- Enable jsm and re-enable qlogic FC drivers as modules.
- Enable ocfs2, autofs4 and fuse filesystems as modules.
- Enable Kprobes.
- Enable ebus, binfmt_misc, sas attrs, md5 reshape, hvc rtas backend and
  some infiniband options.
- Finally disable debug options: DEBUG_MUTEXES and DEBUG_STACK_USAGE.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>