Use SPDX license identifier

.SRCINFO

@@ -4,7 +4,7 @@ pkgbase = vmaf
 	pkgrel = 1
 	url = https://github.com/Netflix/vmaf/
 	arch = x86_64
-	license = BSD
+	license = BSD-2-Clause-Patent
 	checkdepends = vim
 	makedepends = meson
 	makedepends = nasm

PKGBUILD

@@ -6,7 +6,7 @@ pkgrel=1
 pkgdesc='Perceptual video quality assessment algorithm based on multi-method fusion'
 arch=('x86_64')
 url='https://github.com/Netflix/vmaf/'
-license=('BSD')
+license=('BSD-2-Clause-Patent')
 depends=(
     'gcc-libs')
 makedepends=(