Let us discover and use IMSIC guest files from the IMSIC global
config provided by the IMSIC irqchip driver.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20240411090639.237119-3-apatel@ventanamicro.comSigned-off-by: Anup Patel <anup@brainfault.org>