erratum of VLDR instruction bug in Thumb-2 mode. The workaround should not...

erratum of VLDR instruction bug in Thumb-2 mode. The workaround should not affect by the setting of ai_usermode.

BugLink: http://bugs.launchpad.net/bugs/611634

Signed-off-by: Eric Miao <eric.miao@canonical.com>
Signed-off-by: Brad Figg <brad.figg@canonical.com>