Cycles: Tweaks to support CUDA 8 toolkit

All the changes are mainly giving explicit tips on inlining functions,
so they match how inlining worked with previous toolkit.

This make kernel compiled by CUDA 8 render in average with same speed
as previous kernels. Some scenes are somewhat faster, some of them are
somewhat slower. But slowdown is within 1% so far.

On a positive side it allows us to enable newer generation cards on
buildbots (so GTX 10x0 will be officially supported soon).

intern/cycles/kernel/svm/svm_attribute.h

@@ -123,7 +123,10 @@ ccl_device void svm_node_attr_bump_dx(KernelGlobals *kg, ShaderData *sd, float *
 	}
 }
 
-ccl_device void svm_node_attr_bump_dy(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
+ccl_device void svm_node_attr_bump_dy(KernelGlobals *kg,
+                                      ShaderData *sd,
+                                      float *stack,
+                                      uint4 node)
 {
 	NodeAttributeType type, mesh_type;
 	AttributeElement elem;