Add description for Zve32x Zve32f Zve64x Zve64f Zve64d ISA extensions.
Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240510-zve-detection-v5-4-0711bdd26c12@sifive.comSigned-off-by: Palmer Dabbelt <palmer@rivosinc.com>