drivers: net: smsc: Add COMPILE_TEST support

Improve the build testing of these SMSC drivers by enabling them when
COMPILE_TEST is selected.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/smsc/Kconfig

@@ -8,7 +8,7 @@ config NET_VENDOR_SMSC
 	default y
 	depends on ARM || ARM64 || ATARI_ETHERNAT || COLDFIRE || \
 		   ISA || MAC || MIPS || NIOS2 || PCI || \
-		   PCMCIA || SUPERH || XTENSA || H8300
+		   PCMCIA || SUPERH || XTENSA || H8300 || COMPILE_TEST
 	help
 	  If you have a network (Ethernet) card belonging to this class, say Y.
 
@@ -39,7 +39,7 @@ config SMC91X
 	select MII
 	depends on !OF || GPIOLIB
 	depends on ARM || ARM64 || ATARI_ETHERNAT || COLDFIRE || \
-		   MIPS || NIOS2 || SUPERH || XTENSA || H8300
+		   MIPS || NIOS2 || SUPERH || XTENSA || H8300 || COMPILE_TEST
 	help
 	  This is a driver for SMC's 91x series of Ethernet chipsets,
 	  including the SMC91C94 and the SMC91C111. Say Y if you want it
@@ -78,7 +78,7 @@ config SMC911X
 	tristate "SMSC LAN911[5678] support"
 	select CRC32
 	select MII
-	depends on (ARM || SUPERH)
+	depends on (ARM || SUPERH || COMPILE_TEST)
 	help
 	  This is a driver for SMSC's LAN911x series of Ethernet chipsets
 	  including the new LAN9115, LAN9116, LAN9117, and LAN9118.