Add the recommended erratum mitigation sequence to
__gnu_cmse_nonsecure_call for use on Armv8-m.main devices. Since this
is in the library code we cannot know in advance whether the core we
are running on will be affected by this, so always enable it.
libgcc:
PR target/102035
* config/arm/cmse_nonsecure_call.S (__gnu_cmse_nonsecure_call):
Add vlldm erratum work-around.
(cherry picked from commit 574e7950bd)