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/vtx-fetch-branch.ll b/llvm/test/CodeGen/AMDGPU/vtx-fetch-branch.ll
index 4584d6e..4c5eb3d 100644
--- a/llvm/test/CodeGen/AMDGPU/vtx-fetch-branch.ll
+++ b/llvm/test/CodeGen/AMDGPU/vtx-fetch-branch.ll
@@ -10,7 +10,7 @@
 ; CHECK-NOT: ALU_POP_AFTER
 ; CHECK: TEX
 ; CHECK-NEXT: POP
-define void @test(i32 addrspace(1)* %out, i32 addrspace(1)* %in, i32 %cond) {
+define amdgpu_kernel void @test(i32 addrspace(1)* %out, i32 addrspace(1)* %in, i32 %cond) {
 entry:
   %0 = icmp eq i32 %cond, 0
   br i1 %0, label %endif, label %if