Revert "Enable RWSEM_XCHGADD_ALGORITHM by default (ziggy471)"

This reverts commit 455813978763630ad70637ab9c8cfe30c6e6be3c.
Revert "Revert "arm/crypto: Add optimized AES and SHA1 routines""

This reverts commit 1d5fd1141f6eb31747be4c75fd0beb55b2c1a934.