vkd3d-shader/sm4: Merge sm4.h into tpf.c.

Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/174

Makefile.am

@@ -259,7 +259,6 @@ libvkd3d_shader_la_SOURCES = \
 	libs/vkd3d-shader/hlsl_sm1.c \
 	libs/vkd3d-shader/ir.c \
 	libs/vkd3d-shader/preproc.h \
-	libs/vkd3d-shader/sm4.h \
 	libs/vkd3d-shader/spirv.c \
 	libs/vkd3d-shader/tpf.c \
 	libs/vkd3d-shader/trace.c \

libs/vkd3d-shader/hlsl.h

@@ -24,7 +24,9 @@
 #include "rbtree.h"
 #include "vkd3d_d3dcommon.h"
 #include "vkd3d_d3dx9shader.h"
-#include "sm4.h"
+
+enum vkd3d_sm4_register_type;
+enum vkd3d_sm4_swizzle_type;
 
 /* The general IR structure is inspired by Mesa GLSL hir, even though the code
  * ends up being quite different in practice. Anyway, here comes the relevant