habanalabs: align ioctl uapi structures to 64-bit

The compiler is padding the members of the struct to be aligned to
64-bit. The content of the padded bytes is and not zeroed explicitly,
hence might copy undefined data. We add a padding member to the struct
to get a zeroed 64-bit align struct.
Signed-off-by: Dan Rapaport <drapaport@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

include/uapi/misc/habanalabs.h

@@ -949,6 +949,7 @@ struct hl_cs_in {
 
 	/* Context ID - Currently not in use */
 	__u32 ctx_id;
+	__u8 pad[4];
 };
 
 struct hl_cs_out {