net/fsl_pq_mdio: Fix asm/ucc.h compile error for ARM

The UCC specific code included in fsl_pq_mdio.c (with
function calls from asm/ucc.h) is already guarded
by these config options, so this ARM build fix only
provides consistency with the rest UCC specific code.

Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>