Build: Make libraries compile on Linux ARM64 again

NASM is an x86 assembler, doesn't work on ARM.

build_files/build_environment/cmake/x264.cmake

@@ -6,7 +6,7 @@ if(WIN32)
   set(X264_EXTRA_ARGS --enable-win32thread)
 endif()
 
-if((APPLE AND NOT BLENDER_PLATFORM_ARM) OR (UNIX AND NOT APPLE))
+if(UNIX AND NOT BLENDER_PLATFORM_ARM)
   set(X264_CONFIGURE_ENV ${CONFIGURE_ENV} &&
     export AS=${LIBDIR}/nasm/bin/nasm
   )