[PATCH 0/2] i386: Add missing AVX512BW dependency for ISAs using 32/64 bit mask

[Haochen Jiang via Gcc-patches]

Hi all,

32/64 bit mask are introduced in AVX512BW. Therefore, when we are using them,
we should imply AVX512BW.

The two patches added the dependency and removed the redundant AVX512BW usage
for AVX512BITALG and AVX512VBMI2.

Tested on x86_64-pc-linux-gnu. Ok for trunk?

BRs,
Haochen