av1_c_vs_simd_encode.sh: fix missing cpu-used vals for arm

fixes:
seq: missing operand

after:
e845a86a42 Modify c vs SIMD test

The result was no good quality encodes were being run for arm, just
realtime.

Change-Id: Ib90ae25d40daa16e4ec46c734b0d9a5d80b91945

test/av1_c_vs_simd_encode.sh

diff --git a/test/av1_c_vs_simd_encode.sh b/test/av1_c_vs_simd_encode.sh
index 4fc481a..d2e4e9b 100755
--- a/test/av1_c_vs_simd_encode.sh
+++ b/test/av1_c_vs_simd_encode.sh
@@ -355,13 +355,23 @@
   fi
 
   if [ "${preset}" = "good" ]; then
-    if [ "${arch}" = "x86_64" ]; then
-      local min_cpu_used=0
-      local max_cpu_used=6
-    elif [ "${arch}" = "x86" ]; then
-      local min_cpu_used=2
-      local max_cpu_used=3
-    fi
+    case "${arch}" in
+      arm64)
+        # Speed 0 is not tested as arm64 is run under emulation.
+        local min_cpu_used=1
+        local max_cpu_used=6
+        ;;
+      x86)
+        # x86 has a good amount of overlap with x86-64. Only a few values are
+        # tested to improve the runtime of the script.
+        local min_cpu_used=2
+        local max_cpu_used=3
+        ;;
+      *)
+        local min_cpu_used=0
+        local max_cpu_used=6
+        ;;
+    esac
     local test_params=av1_encode_good_params
   elif [ "${preset}" = "rt" ]; then
     local min_cpu_used=5