Leave iTempo set to 0 on all libbretro platforms. This fixes the build
failure for Miyoo. Also results in iTempo being 0 for Raspberry Pi 1,
which is faster than the Miyoo but slower than the new 3DS.
#if defined(HAVE_PRE_ARMV7) && !defined(_3DS) /* XXX GPH hack */
spu_config.iUseReverb = 0;
spu_config.iUseInterpolation = 0;
#if defined(HAVE_PRE_ARMV7) && !defined(_3DS) /* XXX GPH hack */
spu_config.iUseReverb = 0;
spu_config.iUseInterpolation = 0;
spu_config.iTempo = 1;
#endif
#endif
spu_config.iTempo = 1;
#endif
#endif