[AArch64][NEON] Remove undocumented vceqz{,q}_p16, vml{a,s}q_n_f64 intrinsics
Prior to this patch, Clang supported the following C/C++ intrinsics:
vceqz_p16
vceqzq_p16
vmlaq_n_f64
vmlsq_n_f64
... exposed through arm_neon.h. However, these intrinsics are not part
of the ACLE, allowing developers to write code that is not compatible
with other toolchains.
This patch removes these intrinsics.
There is a bug report capturing this issue here:
https://bugs.llvm.org/show_bug.cgi?id=47471
Reviewed By: bsmith
Differential Revision: https://reviews.llvm.org/D93206