ARM: move AES typedefs and function prototypes to separate header

Put the struct definitions for AES keys and the asm function prototypes in a
separate header and export the asm functions from the module.
This allows other drivers to use them directly.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

diff --cc arch/arm/crypto/aes_glue.c
Simple merge

diff --cc arch/arm/crypto/aes_glue.h
Simple merge