control:configs:rainier-*4u: Add new hot card

Add the Dragonhead PCIe card to the hot cards list pcie_cards.json for
the Rainier 4U and 1S4U.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: Idd355a350f39e0c8739fd3c68f16840f7da70cec
2 files changed