Revert "net: vertexcom: default to disabled on kbuild"

This reverts commit 6bf950a8.

To align with other vendors, NET_VENDOR configs are supposed to be ON by
default, while their drivers should default to OFF.
Suggested-by: NJakub Kicinski <kuba@kernel.org>
Signed-off-by: NSaeed Mahameed <saeedm@nvidia.com>
Link: https://lore.kernel.org/r/20220110205246.66298-1-saeed@kernel.orgSigned-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/vertexcom/Kconfig

@@ -5,7 +5,7 @@
 
 config NET_VENDOR_VERTEXCOM
 	bool "Vertexcom devices"
-	default n
+	default y
 	help
 	  If you have a network (Ethernet) card belonging to this class, say Y.