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/lds-m0-init-in-loop.ll b/llvm/test/CodeGen/AMDGPU/lds-m0-init-in-loop.ll
index 078d633..1b3eeed 100644
--- a/llvm/test/CodeGen/AMDGPU/lds-m0-init-in-loop.ll
+++ b/llvm/test/CodeGen/AMDGPU/lds-m0-init-in-loop.ll
@@ -18,7 +18,7 @@
 
 ; GCN: BB0_3:
 ; GCN-NEXT: s_endpgm
-define void @copy_local_to_global_loop_m0_init(i32 addrspace(1)* noalias nocapture %out, i32 addrspace(3)* noalias nocapture readonly %in, i32 %n) #0 {
+define amdgpu_kernel void @copy_local_to_global_loop_m0_init(i32 addrspace(1)* noalias nocapture %out, i32 addrspace(3)* noalias nocapture readonly %in, i32 %n) #0 {
 bb:
   %tmp = icmp sgt i32 %n, 0
   br i1 %tmp, label %.lr.ph.preheader, label %._crit_edge