sparc64: vcc: Enable VCC port probe and removal

sparc64: vcc: Enable VCC port probe and removal

Enables VCC port probe and removal to initialize and terminate
VCC ports respectively. When a device/port matching the VCC driver
is added, the probe function is invoked along with a reference
to the device. remove function is called when the device is
removed.

Also add APIs to cache and retrieve VCC ports from a VCC table

Signed-off-by: Jagannathan Raman <[email protected]>
Reviewed-by: Liam Merwick <[email protected]>
Reviewed-by: Shannon Nelson <[email protected]>
Signed-off-by: David S. Miller <[email protected]>