treewide: Enable VFP/NEON optimizations for aarch64

For speexdsp, support for NEON on aarch64 was added in 1.2.0[1].

[1]: https://github.com/xiph/speexdsp/pull/8

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
(cherry picked from commit dec17eb36c)

multimedia/ffmpeg/Makefile

@@ -444,7 +444,7 @@ FFMPEG_CONFIGURE+= \
 	--disable-fast-unaligned \
 	--disable-runtime-cpudetect
 
-else ifneq ($(findstring arm,$(CONFIG_ARCH)),)
+else ifneq ($(findstring arm,$(CONFIG_ARCH))$(findstring aarch64,$(CONFIG_ARCH)),)
 FFMPEG_CONFIGURE+= \
 	--disable-runtime-cpudetect
 # XXX: GitHub issue 3320 ppc cpu with fpu but no altivec (WNDR4700)
@@ -478,6 +478,13 @@ ifneq ($(findstring arm,$(CONFIG_ARCH)),)
 	endif
 endif
 
+ifneq ($(findstring aarch64,$(CONFIG_ARCH)),)
+	FFMPEG_CONFIGURE+= \
+		--enable-lto \
+		--enable-neon \
+		--enable-vfp
+endif
+
 ifeq ($(ARCH),x86_64)
 	FFMPEG_CONFIGURE+= --enable-lto
 endif