[ffmpeg] use 'max' configuration for arm64

This CL changes the ffmpeg configuration for arm64 to 'max' to
support more container and compression formats. This makes arm64
format support the same as on x64.

MS-2051 #comment

TEST: played audio portion of an mp4 file on vim2
Change-Id: I00526e965e3a235d6e5a47d5ac954d8bd78db9a3
diff --git a/ffmpeg_options.gni b/ffmpeg_options.gni
index 3027a77..5112be9 100644
--- a/ffmpeg_options.gni
+++ b/ffmpeg_options.gni
@@ -4,11 +4,7 @@
 
 declare_args() {
   # Controls what formats are supported. Legal values are [default|max].
-  if (current_cpu == "x64") {
-    ffmpeg_profile = "max"
-  } else {
-    ffmpeg_profile = "default"
-  }
+  ffmpeg_profile = "max"
 }
 
 assert(ffmpeg_profile == "default" || ffmpeg_profile == "max")