ffmpeg: Backport patch to fix build with gcc9

(From OE-Core rev: 545b58b9169aad38ad6c180b1fa690f878d6781a)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-multimedia/ffmpeg/ffmpeg/0001-postproc-postprocess_template-remove-FF_REG_sp-from-.patch

@@ -0,0 +1,31 @@
+From c1cbeb87db4bfc6e281e4254a6c7fdd3854fc9b9 Mon Sep 17 00:00:00 2001
+From: Michael Niedermayer <michael@niedermayer.cc>
+Date: Thu, 20 Dec 2018 22:40:06 +0100
+Subject: [PATCH] postproc/postprocess_template: remove FF_REG_sp from clobber
+ list
+
+Future gcc may no longer support this
+
+Upstream-Status: Backport [https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/c1cbeb87db4bfc6e281e4254a6c7fdd3854fc9b9]
+Tested-by: James Almer <jamrial@gmail.com>
+Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
+---
+ libpostproc/postprocess_template.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/libpostproc/postprocess_template.c b/libpostproc/postprocess_template.c
+index 485eb5cfc0..b0adfd168c 100644
+--- a/libpostproc/postprocess_template.c
++++ b/libpostproc/postprocess_template.c
+@@ -1317,7 +1317,7 @@ DERING_CORE((%0, %1, 8)       ,(%%FF_REGd, %1, 4),%%mm2,%%mm4,%%mm0,%%mm3,%%mm5,
+         "1:                        \n\t"
+         : : "r" (src), "r" ((x86_reg)stride), "m" (c->pQPb), "m"(c->pQPb2), "q"(tmp)
+           NAMED_CONSTRAINTS_ADD(deringThreshold,b00,b02,b08)
+-        : "%"FF_REG_a, "%"FF_REG_d, "%"FF_REG_sp
++        : "%"FF_REG_a, "%"FF_REG_d
+     );
+ #else // HAVE_7REGS && (TEMPLATE_PP_MMXEXT || TEMPLATE_PP_3DNOW)
+     int y;
+-- 
+2.20.1
+

meta/recipes-multimedia/ffmpeg/ffmpeg_4.0.2.bb

@@ -26,6 +26,7 @@ LIC_FILES_CHKSUM = "file://COPYING.GPLv2;md5=b234ee4d69f5fce4486a80fdaf4a4263 \
 SRC_URI = "https://www.ffmpeg.org/releases/${BP}.tar.xz \
            file://mips64_cpu_detection.patch \
            file://CVE-2018-15822.patch \
+           file://0001-postproc-postprocess_template-remove-FF_REG_sp-from-.patch \
            "
 SRC_URI[md5sum] = "ae0bfdf809306a212b4f0e6eb8d1c75e"
 SRC_URI[sha256sum] = "a95c0cc9eb990e94031d2183f2e6e444cc61c99f6f182d1575c433d62afb2f97"