mii: Fix SMSC name

The LAN8700 / LAN8710 PHYs were Standard Microsystems Corporation (SMSC)
parts.  I presume SMC was chosen as an abbreviation, but the company
always used SMSC as its short name.

SMSC was acquired by Microchip in 2012.  I kept the pre-acquisition
name, as NetBSD (from where we obtained miidevs) uses SMSC.

Reviewed by:	adrian
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D56819

sys/dev/mii/miidevs

@@ -72,7 +72,7 @@ oui RDC				0x00d02d	RDC Semiconductor
 oui REALTEK			0x00e04c	Realtek Semicondctor
 oui SEEQ			0x00a07d	Seeq Technology
 oui SIS				0x00e006	Silicon Integrated Systems
-oui SMC				0x00800f	SMC
+oui SMSC			0x00800f	Microchip (formerly SMSC)
 oui TI				0x080028	Texas Instruments
 oui TSC				0x00c039	TDK Semiconductor
 oui VITESSE			0x0001c1	Vitesse Semiconductor
@@ -361,6 +361,6 @@ model xxVITESSE VSC8514		0x0027 Vitesse VSC8514 10/100/1000TX PHY
 /* XaQti Corp. PHYs */
 model xxXAQTI XMACII		0x0000 XaQti Corp. XMAC II gigabit interface
 
-/* SMC */
-model SMC LAN8710A		0x000F SMC LAN8710A 10/100 interface
-model SMC LAN8700		0x000C SMC LAN8700  10/100 interface
+/* Microchip (formerly SMSC) */
+model SMSC LAN8710A		0x000F Microchip LAN8710A 10/100 interface
+model SMSC LAN8700		0x000C Microchip LAN8700  10/100 interface

sys/dev/mii/smscphy.c

@@ -74,8 +74,8 @@ static driver_t smscphy_driver = {
 DRIVER_MODULE(smscphy, miibus, smscphy_driver, 0, 0);
 
 static const struct mii_phydesc smscphys[] = {
-	MII_PHY_DESC(SMC, LAN8710A),
-	MII_PHY_DESC(SMC, LAN8700),
+	MII_PHY_DESC(SMSC, LAN8710A),
+	MII_PHY_DESC(SMSC, LAN8700),
 	MII_PHY_END
 };