crypto: atmel-sha - fix atmel_sha_remove()

Since atmel_sha_probe() uses devm_xxx functions to allocate resources,
atmel_sha_remove() should no longer explicitly release them.

Cc: stable@vger.kernel.org
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Fixes: b0e8b341 ("crypto: atmel - use devm_xxx() managed function")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>