powerpc: Update cpu_user_features2 in scan_features()

powerpc: Update cpu_user_features2 in scan_features()

BugLink: http://bugs.launchpad.net/bugs/1578798
commit beff82374b259d726e2625ec6c518a5f2613f0ae upstream.

scan_features() updates cpu_user_features but not cpu_user_features2.

Amongst other things, cpu_user_features2 contains the user TM feature
bits which we must keep in sync with the kernel TM feature bit.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>