[RISCV] Move some vector tests to rvv directory. NFC

I personally find it handy to be able to run the check-llvm-codegen-riscv-rvv target to test anything that involves vector codegen, so this patch moves some more vector-based test cases into that directory to increase its coverage.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D147644

diff --git a/llvm/test/CodeGen/RISCV/fold-vector-cmp.ll b/llvm/test/CodeGen/RISCV/rvv/fold-vector-cmp.ll
similarity index 100%
rename from llvm/test/CodeGen/RISCV/fold-vector-cmp.ll
rename to llvm/test/CodeGen/RISCV/rvv/fold-vector-cmp.ll

diff --git a/llvm/test/CodeGen/RISCV/fpclamptosat_vec.ll b/llvm/test/CodeGen/RISCV/rvv/fpclamptosat_vec.ll
similarity index 100%
rename from llvm/test/CodeGen/RISCV/fpclamptosat_vec.ll
rename to llvm/test/CodeGen/RISCV/rvv/fpclamptosat_vec.ll

diff --git a/llvm/test/CodeGen/RISCV/scalable-vector-struct.ll b/llvm/test/CodeGen/RISCV/rvv/scalable-vector-struct.ll
similarity index 100%
rename from llvm/test/CodeGen/RISCV/scalable-vector-struct.ll
rename to llvm/test/CodeGen/RISCV/rvv/scalable-vector-struct.ll

diff --git a/llvm/test/CodeGen/RISCV/vadd-vp-mask.ll b/llvm/test/CodeGen/RISCV/rvv/vadd-vp-mask.ll
similarity index 100%
rename from llvm/test/CodeGen/RISCV/vadd-vp-mask.ll
rename to llvm/test/CodeGen/RISCV/rvv/vadd-vp-mask.ll

diff --git a/llvm/test/CodeGen/RISCV/vec3-setcc-crash.ll b/llvm/test/CodeGen/RISCV/rvv/vec3-setcc-crash.ll
similarity index 100%
rename from llvm/test/CodeGen/RISCV/vec3-setcc-crash.ll
rename to llvm/test/CodeGen/RISCV/rvv/vec3-setcc-crash.ll

diff --git a/llvm/test/CodeGen/RISCV/vmul-vp-mask.ll b/llvm/test/CodeGen/RISCV/rvv/vmul-vp-mask.ll
similarity index 100%
rename from llvm/test/CodeGen/RISCV/vmul-vp-mask.ll
rename to llvm/test/CodeGen/RISCV/rvv/vmul-vp-mask.ll

diff --git a/llvm/test/CodeGen/RISCV/vsub-vp-mask.ll b/llvm/test/CodeGen/RISCV/rvv/vsub-vp-mask.ll
similarity index 100%
rename from llvm/test/CodeGen/RISCV/vsub-vp-mask.ll
rename to llvm/test/CodeGen/RISCV/rvv/vsub-vp-mask.ll