RISC-V: Correctly print supported extensions

This commit replaces BITS_PER_LONG with number of alphabet letters.

Current ISA pretty-printing code expects extension 'a' (bit 0) through
'z' (bit 25).  Although bit 26 and higher is not currently used (thus never
cause an issue in practice), it will be an annoying problem if we start to
use those in the future.

This commit disables printing high bits for now.

Reviewed-by: Anup Patel <[email protected]>
Tested-by: Heiko Stuebner <[email protected]>
Signed-off-by: Tsukasa OI <[email protected]>
Signed-off-by: Atish Patra <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>

0 files changed, 0 insertions, 0 deletions