M1: vendored sha2/md5 (OpenBSD 8.0) + endian/swap compat; module builds green

module/include/compat/sys/endian.h

@@ -3,4 +3,17 @@
 #define _PFK_SYS_ENDIAN_H
 #include <linux/byteorder/generic.h>
 #include <linux/byteorder/little_endian.h>
+#include <linux/stddef.h>
+/* BSD byte-order names used by ported code */
+#define LITTLE_ENDIAN	1234
+#define BIG_ENDIAN	4321
+#define PDP_ENDIAN	3412
+#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define BYTE_ORDER	BIG_ENDIAN
+#else
+#define BYTE_ORDER	LITTLE_ENDIAN
+#endif
+#define swap16(x)	swab16(x)
+#define swap32(x)	swab32(x)
+#define swap64(x)	swab64(x)
 #endif