feat: update parameters to enable ESPI for FVP

Enable support for ESPI and increase the virtual interrupt count to
5120 to accommodate interrupts in extended range [4096, 5119].

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I9aa5b12723743aa670688d4be2c52486b1e39598
1 file changed