[RISCV] Add Smdbltrp and Ssdbltrp extension (#111837)
Smdbltrp and Ssdbltrp supports are added in this PR.
Specification link(Smdbltrp) :
[https://github.com/riscv/riscv-isa-manual/blob/main/src/smdbltrp.adoc](url)
Specification link(Ssdbltrp) :
[https://github.com/riscv/riscv-isa-manual/blob/main/src/ssdbltrp.adoc](url)
