mISDN: endian annotations for struct zt

Found two possible bugs where the z1 value was used directly without
byteswapping.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/isdn/hardware/mISDN/hfc_pci.h

@@ -183,8 +183,8 @@
 #define D_FREG_MASK  0xF
 
 struct zt {
-	unsigned short z1;  /* Z1 pointer 16 Bit */
-	unsigned short z2;  /* Z2 pointer 16 Bit */
+	__le16 z1;  /* Z1 pointer 16 Bit */
+	__le16 z2;  /* Z2 pointer 16 Bit */
 };
 
 struct dfifo {