hw/intc: ibex_plic: Update the pending irqs
After a claim or a priority change we need to update the pending
interrupts. This is based on the same patch for the SiFive PLIC:
55765822804f5a58594e "riscv: plic: Add a couple of mising
sifive_plic_update calls"
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Cc: Jessica Clarke <jrtc27@jrtc27.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <
0693aa700a4c67c49b3f1c973a82b257fdb7198d.
1595655188.git.alistair.francis@wdc.com>