[NVPTX] Fix nvvm.match.sync*.i64 intrinsics return type (i64 -> i32)

NVVM IR specification defines them with i32 return type:

  declare i32 @llvm.nvvm.match.any.sync.i64(i32 %membermask, i64 %value)
  declare {i32, i1} @llvm.nvvm.match.all.sync.i64(i32 %membermask, i64 %value)
  ...
  The i32 return value is a 32-bit mask where bit position in mask corresponds
  to thread’s laneid.

as well as PTX ISA:

  9.7.12.8. Parallel Synchronization and Communication Instructions: match.sync

  match.any.sync.type  d, a, membermask;
  match.all.sync.type  d[|p], a, membermask;
  ...
  Destination d is a 32-bit mask where bit position in mask corresponds
  to thread’s laneid.

Additionally, ptxas doesn't accept intructions, produced by NVPTX backend.
After this patch, it compiles with no issues.

Reviewed By: tra

Differential Revision: https://reviews.llvm.org/D120499