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/drop-mem-operand-move-smrd.ll b/llvm/test/CodeGen/AMDGPU/drop-mem-operand-move-smrd.ll
index 5e1ebfd..878b5eb 100644
--- a/llvm/test/CodeGen/AMDGPU/drop-mem-operand-move-smrd.ll
+++ b/llvm/test/CodeGen/AMDGPU/drop-mem-operand-move-smrd.ll
@@ -9,7 +9,7 @@
 ; GCN: buffer_load_dword
 ; GCN: ds_write2_b32
 ; GCN: s_endpgm
-define void @reschedule_global_load_lds_store(i32 addrspace(1)* noalias %gptr0, i32 addrspace(1)* noalias %gptr1, i32 addrspace(3)* noalias %lptr, i32 %c) #0 {
+define amdgpu_kernel void @reschedule_global_load_lds_store(i32 addrspace(1)* noalias %gptr0, i32 addrspace(1)* noalias %gptr1, i32 addrspace(3)* noalias %lptr, i32 %c) #0 {
 entry:
   %tid = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %idx = shl i32 %tid, 2