Riku Voipio authored 12 years ago and Brad King committed 12 years ago

The __aarch64__ defines Aarch64, while __AARCH64EB__ defines bigendian
and __AARCH64EL__ little endian.  Only little endian tested, no big
endian toolchain exists yet.

Change-Id: Ieded9bdb0557ad1e1f3a5b08fbe210df23079e5e
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>