scalar-crypto: Encoding fixes for v0.9.2

- Reverts the AES32 and SM4 instruction encodings back to a normal R-type
  encoding, per the advice of the architecture reviewers.

 On branch scalar-crypto-v0.9.2
 Changes to be committed:
	modified:   riscv/encoding.h
	modified:   riscv/insns/aes32dsi.h
	modified:   riscv/insns/aes32dsmi.h
	modified:   riscv/insns/aes32esi.h
	modified:   riscv/insns/aes32esmi.h
	modified:   riscv/insns/sm4ed.h
	modified:   riscv/insns/sm4ks.h

1 files changed, 1 insertions, 2 deletions

diff --git a/riscv/insns/sm4ks.h b/riscv/insns/sm4ks.h
index 589eb97..5758d57 100644
--- a/riscv/insns/sm4ks.h
+++ b/riscv/insns/sm4ks.h
@@ -15,7 +15,6 @@ uint32_t x      = sb_out ^
 uint32_t rotl   = (x << (8*bs)) | (x >> (32-8*bs));
 
 uint32_t result = rotl ^ RS1;
-uint64_t rd     = insn.rs1(); // RD sourced from RS1 field.
 
-WRITE_REG(rd, zext_xlen(result));
+WRITE_RD(zext_xlen(result));