PCI: Fix TI816X class code quirk

PCI: Fix TI816X class code quirk

commit d1541dc977d376406f4584d8eb055488655c98ec upstream.

In fixup_ti816x_class(), we assigned "class = PCI_CLASS_MULTIMEDIA_VIDEO".
But PCI_CLASS_MULTIMEDIA_VIDEO is only the two-byte base class/sub-class
and needs to be shifted to make space for the low-order interface byte.

Shift PCI_CLASS_MULTIMEDIA_VIDEO to set the correct class code.

Fixes: 63c4408074cb ("PCI: Add quirk for setting valid class for TI816X Endpoint")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Hemant Pedanekar <hemantp@ti.com>
[bwh: Backported to 3.2: the class check is done in this function as there
 is no DECLARE_PCI_FIXUP_CLASS_EARLY()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>