Initial rebase of xerpi's port

src/cpuinfo/SDL_cpuinfo.c

@@ -450,6 +450,8 @@ CPU_haveNEON(void)
     return IsProcessorFeaturePresent(PF_ARM_NEON_INSTRUCTIONS_AVAILABLE) != 0;
 #elif (defined(__ARM_ARCH) && (__ARM_ARCH >= 8)) || defined(__aarch64__)
     return 1;  /* ARMv8 always has non-optional NEON support. */
+#elif __VITA__
+    return 1;
 #elif defined(__APPLE__) && defined(__ARM_ARCH) && (__ARM_ARCH >= 7)
     /* (note that sysctlbyname("hw.optional.neon") doesn't work!) */
     return 1;  /* all Apple ARMv7 chips and later have NEON. */