arm/crypto: Add optimized AES and SHA1 routines

Signed-off-by: flar2 <asegaert@gmail.com>
add exfat support

Signed-off-by: flar2 <asegaert@gmail.com>
lib/int_sqrt.c: optimize square root algorithm

Signed-off-by: flar2 <asegaert@gmail.com>