Revert ARM part of [806505a4]

src/misc/cpu.c

@@ -257,6 +257,10 @@ out:
 # if defined (__ARM_NEON__)
     i_capabilities |= CPU_CAPABILITY_NEON;
 # elif defined (CAN_COMPILE_NEON)
+#  define NEED_RUNTIME_CPU_CHECK 1
+# endif
+
+# ifdef NEED_RUNTIME_CPU_CHECK
 #  if defined (__linux__)
     FILE *info = fopen ("/proc/cpuinfo", "rt");
     if (info != NULL)
@@ -271,10 +275,12 @@ out:
             if (strncmp (line, "Features\t:", 10))
                 continue;
 
+            /* TODO: detect other CPU features when we use them */
+#   if defined (CAN_COMPILE_NEON) && !defined (__ARM_NEON__)
                 cap = strstr (line + 10, " neon");
             if (cap != NULL && (cap[5] == '\0' || cap[5] == ' '))
                 i_capabilities |= CPU_CAPABILITY_NEON;
-
+#   endif
             break;
         }
         fclose (info);