AMDGPU: Mark all unspecified CC functions in tests as amdgpu_kernel

Currently the default C calling convention functions are treated
the same as compute kernels. Make this explicit so the default
calling convention can be changed to a non-kernel.

Converted with perl -pi -e 's/define void/define amdgpu_kernel void/'
on the relevant test directories (and undoing in one place that actually
wanted a non-kernel).

llvm-svn: 298444
diff --git a/llvm/test/CodeGen/AMDGPU/i1-copy-phi.ll b/llvm/test/CodeGen/AMDGPU/i1-copy-phi.ll
index d491277..b160af8 100644
--- a/llvm/test/CodeGen/AMDGPU/i1-copy-phi.ll
+++ b/llvm/test/CodeGen/AMDGPU/i1-copy-phi.ll
@@ -10,7 +10,7 @@
 ; SI: s_and_saveexec_b64
 ; SI: s_xor_b64
 ; SI: s_endpgm
-define void @br_i1_phi(i32 %arg) {
+define amdgpu_kernel void @br_i1_phi(i32 %arg) {
 bb:
   %tidig = call i32 @llvm.r600.read.tidig.x() #0
   %cmp = trunc i32 %tidig to i1