meta-fp5280g2: Remove references to vcs-workaround

This was a P9 DD1 workaround. These systems are no longer supported and
are not found in the wild, so the workaround has been retired.

All of the p9 systems in the tree exclude the package so this change
should be a noop.

(From meta-inspur rev: c7540334485b74040773d3891febd74c359535fe)

Signed-off-by: Joel Stanley <joel@jms.id.au>
Change-Id: I3091afb20e7fac7e81276873637b10100edb8872
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>