aom: Enable runtime CPU detection for AArch64

The underlying issue has been fixed in the following upstream commits.

https://aomedia.googlesource.com/aom/+/5ccdc66ab6eb8eb300eda854fab4ff250b2c2f92
https://aomedia.googlesource.com/aom/+/fb21617c1f3ef49795597e006b68adfba6e54be0

mingw-w64-aom/PKGBUILD

@@ -4,7 +4,7 @@ _realname=aom
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=3.10.0
-pkgrel=1
+pkgrel=2
 pkgdesc='AV1 codec library (mingw-w64)'
 arch=('any')
 mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clang32' 'clangarm64')
@@ -38,10 +38,6 @@ build() {
     extra_config+=("-DCMAKE_BUILD_TYPE=Debug")
   fi
 
-  if [[ "${CARCH}" == "aarch64" ]]; then
-      extra_config+=("-DCONFIG_RUNTIME_CPU_DETECT=0")
-  fi
-
   MSYS2_ARG_CONV_EXCL="-DCMAKE_INSTALL_PREFIX=" \
     ${MINGW_PREFIX}/bin/cmake \
       -GNinja \