crypto/nx: disable NX on little endian builds

The NX driver has endian issues so disable it for now.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index f066fa2..02f177a 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -313,7 +313,7 @@
 
 config CRYPTO_DEV_NX
 	bool "Support for IBM Power7+ in-Nest cryptographic acceleration"
-	depends on PPC64 && IBMVIO
+	depends on PPC64 && IBMVIO && !CPU_LITTLE_ENDIAN
 	default n
 	help
 	  Support for Power7+ in-Nest cryptographic acceleration.