postproc/postprocess: Don't generally include arch-specific headers

Reviewed-by: Sean McGovern <gseanmcg@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libpostproc/postprocess.c

@@ -88,7 +88,6 @@ try to unroll inner for(x=0 ... loop to avoid these damn if(x ... checks
 #include "postprocess.h"
 #include "postprocess_internal.h"
 #include "libavutil/avstring.h"
-#include "libavutil/ppc/util_altivec.h"
 
 #define GET_MODE_BUFFER_SIZE 500
 #define OPTIONS_ARRAY_SIZE 10
@@ -499,6 +498,8 @@ static av_always_inline void do_a_deblock_C(uint8_t *src, int step,
 #include "postprocess_template.c"
 
 #if HAVE_ALTIVEC
+#include "libavutil/ppc/util_altivec.h"
+
 #   define TEMPLATE_PP_ALTIVEC 1
 #   include "postprocess_altivec_template.c"
 #   include "postprocess_template.c"

libpostproc/postprocess_template.c

@@ -22,9 +22,12 @@
  * @file
  * mmx/mmx2/sse2 postprocess code.
  */
+#include "config.h"
 
 #include "libavutil/mem_internal.h"
+#if ARCH_X86
 #include "libavutil/x86/asm.h"
+#endif
 
 /* A single TEMPLATE_PP_* should be defined (to 1) when this template is
  * included. The following macros will define its dependencies to 1 as well
@@ -830,7 +833,7 @@ static inline void RENAME(doVertDefFilter)(uint8_t src[], int stride, PPContext
 #if !TEMPLATE_PP_ALTIVEC
 static inline void RENAME(dering)(uint8_t src[], int stride, PPContext *c)
 {
-#if HAVE_7REGS && TEMPLATE_PP_MMXEXT
+#if TEMPLATE_PP_MMXEXT && HAVE_7REGS
     DECLARE_ALIGNED(8, uint64_t, tmp)[3];
     __asm__ volatile(
         "pxor %%mm6, %%mm6                      \n\t"