bus/dpaa: check portal presence in the caller function

bus/dpaa: check portal presence in the caller function

In the I/O path we were calling rte_dpaa_portal_init which
internally checks if a portal is affined to the core.
But this lead to calling of that non-static API in every call.

Instead check the portal affinity in the caller itself for
performance reasons

Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>