make sff page reads work on little endian archs too. like amd64.

some modules seem to need more time when waiting for bytes while here.

hrvoje popovski hit the endian issue

sys/dev/pci/if_myx.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_myx.c,v 1.105 2019/04/15 03:06:12 dlg Exp $	*/
+/*	$OpenBSD: if_myx.c,v 1.106 2019/04/16 09:40:21 dlg Exp $	*/
 
 /*
  * Copyright (c) 2007 Reyk Floeter <reyk@openbsd.org>
@@ -954,9 +954,9 @@ myx_i2c_byte(struct myx_softc *sc, uint8_t off, uint8_t *byte)
 	uint32_t		r;
 	unsigned int		ms;
 
-	memset(&mc, 0, sizeof(mc));
-	mc.mc_data0 = off;
-	for (ms = 0; ms < 50; ms++) {
+	for (ms = 0; ms < 600; ms++) {
+		memset(&mc, 0, sizeof(mc));
+		mc.mc_data0 = htobe32(off);
 		result = myx_cmd(sc, MYXCMD_I2C_BYTE, &mc, &r);
 		switch (result) {
 		case MYXCMD_OK:
@@ -982,8 +982,8 @@ myx_get_sffpage(struct myx_softc *sc, struct if_sffpage *sff)
 	int			result;
 
 	memset(&mc, 0, sizeof(mc));
-	mc.mc_data0 = 1; /* get all 256 bytes */
-	mc.mc_data1 = sff->sff_addr << 8;
+	mc.mc_data0 = htobe32(1); /* get all 256 bytes */
+	mc.mc_data1 = htobe32(sff->sff_addr << 8);
 	result = myx_cmd(sc, MYXCMD_I2C_READ, &mc, NULL);
 	if (result != 0)
 		return (EIO);
@@ -993,7 +993,7 @@ myx_get_sffpage(struct myx_softc *sc, struct if_sffpage *sff)
 
 		result = myx_i2c_byte(sc, 127, &page);
 		if (result != 0)
-			return (EIO);
+			return (result);
 
 		if (page != sff->sff_page)
 			return (ENXIO);