i40e: update version number

Just bumping the version number appropriately.
Signed-off-by: NAlice Michael <alice.michael@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -27,7 +27,7 @@ static const char i40e_driver_string[] =
 
 #define DRV_VERSION_MAJOR 2
 #define DRV_VERSION_MINOR 8
-#define DRV_VERSION_BUILD 10
+#define DRV_VERSION_BUILD 20
 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
 	     __stringify(DRV_VERSION_MINOR) "." \
 	     __stringify(DRV_VERSION_BUILD)    DRV_KERN