crypto: atmel-sha - add support to hmac(shaX)

This patch adds support to the hmac(shaX) algorithms.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/atmel-sha-regs.h

@@ -26,6 +26,7 @@
 #define SHA_MR_ALGO_SHA384		(2 << 8)
 #define SHA_MR_ALGO_SHA512		(3 << 8)
 #define SHA_MR_ALGO_SHA224		(4 << 8)
+#define SHA_MR_HMAC			(1 << 11)
 #define	SHA_MR_DUALBUFF			(1 << 16)
 
 #define SHA_IER				0x10
@@ -42,6 +43,9 @@
 #define SHA_ISR_URAT_MR			(0x2 << 12)
 #define SHA_ISR_URAT_WO			(0x5 << 12)
 
+#define SHA_MSR				0x20
+#define SHA_BCR				0x30
+
 #define	SHA_HW_VERSION		0xFC
 
 #define SHA_TPR				0x108