thunderbolt: Update Kconfig entries to USB4

Since the driver now supports USB4 which is the standard going forward,
update the Kconfig entry to mention this and rename the entry from
CONFIG_THUNDERBOLT to CONFIG_USB4 instead to help people to find the
correct option if they want to enable USB4.

Also do the same for Thunderbolt network driver.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Link: https://lore.kernel.org/r/20191217123345.31850-6-mika.westerberg@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index d02f12a..d1c84d4 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -489,12 +489,12 @@
 	  This driver provides support for Extended Socket network device
 	  on Extended Partitioning of FUJITSU PRIMEQUEST 2000 E2 series.
 
-config THUNDERBOLT_NET
-	tristate "Networking over Thunderbolt cable"
-	depends on THUNDERBOLT && INET
+config USB4_NET
+	tristate "Networking over USB4 and Thunderbolt cables"
+	depends on USB4 && INET
 	help
-	  Select this if you want to create network between two
-	  computers over a Thunderbolt cable. The driver supports Apple
+	  Select this if you want to create network between two computers
+	  over a USB4 and Thunderbolt cables. The driver supports Apple
 	  ThunderboltIP protocol and allows communication with any host
 	  supporting the same protocol including Windows and macOS.