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/r600.alu-limits.ll b/llvm/test/CodeGen/AMDGPU/r600.alu-limits.ll
index c5b8934..2604ed4 100644
--- a/llvm/test/CodeGen/AMDGPU/r600.alu-limits.ll
+++ b/llvm/test/CodeGen/AMDGPU/r600.alu-limits.ll
@@ -6,7 +6,7 @@
 
 %struct.foo = type {i32, i32, i32}
 
-define void @alu_limits(i32 addrspace(1)* %out, %struct.foo* %in, i32 %offset) {
+define amdgpu_kernel void @alu_limits(i32 addrspace(1)* %out, %struct.foo* %in, i32 %offset) {
 entry:
   %ptr = getelementptr inbounds %struct.foo, %struct.foo* %in, i32 1, i32 2
   %x = load i32, i32 *%ptr, align 4