dxva2: Simplify some ifdefs

libavcodec/dxva2_internal.h

@@ -32,11 +32,6 @@
 
 #if CONFIG_DXVA2
 #include "dxva2.h"
-#endif
-#if CONFIG_D3D11VA
-#include "d3d11va.h"
-#endif
-#if HAVE_DXVA_H
 /* When targeting WINAPI_FAMILY_PHONE_APP or WINAPI_FAMILY_APP, dxva.h
  * defines nothing. Force the struct definitions to be visible. */
 #undef WINAPI_FAMILY
@@ -45,6 +40,9 @@
 #define _CRT_BUILD_DESKTOP_APP 0
 #include <dxva.h>
 #endif
+#if CONFIG_D3D11VA
+#include "d3d11va.h"
+#endif
 
 #include "avcodec.h"
 
@@ -59,12 +57,8 @@ typedef union {
 #endif
 } AVDXVAContext;
 
-#if CONFIG_D3D11VA
 #define D3D11VA_CONTEXT(ctx) (&ctx->d3d11va)
-#endif
-#if CONFIG_DXVA2
 #define DXVA2_CONTEXT(ctx)   (&ctx->dxva2)
-#endif
 
 #if CONFIG_D3D11VA && CONFIG_DXVA2
 #define DXVA_CONTEXT_WORKAROUND(avctx, ctx)     (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD ? ctx->d3d11va.workaround : ctx->dxva2.workaround)