powerpc/qe: add Ethernet UPSMR definitions to QE library

Add the UCC_GETH_UPSMR_xxx definitions to qe.h.  The ucc_geth driver will
eventually use these instead of the UPSMR_ macros it currently defines.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>