Define all the register offset directly in the driver according
to the RISCV PLIC specification as they are not configurable,
see: https://github.com/riscv/riscv-plic-spec.
Updated devicetrees that has PLIC accordingly.
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
This commit adds/modifies `riscv,isa` strings using the following rules:
* the ISA string is lowercase
* multi-letter extensions are preceded with the underscore mark
* if an extension is implied by another one, it is not specified - e.g. the
D extension implies the F extension, so writing `rv32ifd` is redundant
Signed-off-by: Filip Kokosinski <fkokosinski@antmicro.com>