refactor(rmm): calculate RIM extension on stack

This patch removes 'rec_params_per_cpu' array of
'rmi_rec_params' structures used for RMI_REC_CREATE
extension of RIM. Calculation is performed on
'struct rmi_rec_params' structure allocated on stack.

Change-Id: I5a940606c63990c4c2a7e1f2a9929755e154a713
Signed-off-by: AlexeiFedorov <Alexei.Fedorov@arm.com>