This commit adds the `riscv` compatible string to cpu nodes where it is
currently missing. This is convention is already followed by some cpu
nodes.
Signed-off-by: Filip Kokosinski <fkokosinski@antmicro.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>
