optimize ossl_sm4_set_key speed

optimize ossl_sm4_set_key speed

this optimization comes from libgcrypt, increse about 48% speed

Benchmark on my AMD Ryzen Threadripper 3990X

before:
Did 5752000 SM4 setup operations in 1000151us (5751131.6 ops/sec)
after:
Did 8506000 SM4 setup operations in 1000023us (8505804.4 ops/sec)

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19270)

(cherry picked from commit 704e8090b4a789f52af07de9a3ebbe11db8e19f8)