T-Head C906/C910 CLINT is not compliant to SiFive ones (and even not
compliant to the newcoming ACLINT spec) because of lack of mtime
register.
Add a compatible string formatted like the C9xx-specific PLIC
compatible, and do not allow a SiFive one as fallback because they're
not really compliant.
Signed-off-by: Icenowy Zheng <uwu@xxxxxxxxxx>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Reviewed-by: Samuel Holland <samuel@xxxxxxxxxxxx>
Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
---