riscv: add ISA extension parsing for Zbc

Zbc was documented in the dt-bindings but actually not supported in ISA
string parsing. Add it.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Link: https://lore.kernel.org/r/20231114141256.126749-2-cleger@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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Clément Léger 2023-11-14 09:12:37 -05:00 • committed by Palmer Dabbelt
commit e45f463a9b
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