crypto: omap-des - Integrate with the crypto engine framework

Since the crypto engine framework had been merged, thus this patch integrates
with the newly added crypto engine framework to make the crypto hardware
engine under utilized as each block needs to be processed before the crypto
hardware can start working on the next block.

The crypto engine framework can manage and process the requests automatically,
so remove the 'queue' and 'queue_task' things in omap des driver.

Signed-off-by: Baolin <baolin.wang@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/Kconfig

@@ -314,6 +314,7 @@ config CRYPTO_DEV_OMAP_DES
 	depends on ARCH_OMAP2PLUS
 	select CRYPTO_DES
 	select CRYPTO_BLKCIPHER
+	select CRYPTO_ENGINE
 	help
 	  OMAP processors have DES/3DES module accelerator. Select this if you
 	  want to use the OMAP module for DES and 3DES algorithms. Currently