drivers: gicv3: fix getting rdist base address

In SMP, MPID is mybe not equal to cpu logic ID, so can't
use MPID to get rdist base address from gic_rdists[], this
patch get logic ID from arch_curr_cpu()->id, and
find current CPU's rdist base address from:
gic_rdists[cpu_logic_id]

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>