fix: skip CPU cycle allocation for SP vCPU to reach message loop

With the support added in Hafnium SPMC for secondary CPU cold boot,
secondary execution contexts of SPs dont need a round of CPU cycles
through ffa_run to reach the message loop.

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: Ib02f51abb31d30329d43f0937ba30d721504bc53
6 files changed