core: Add print string for TSO packets on LL channel

Add strings to display the cumulative result of the segmentation of
TSO packets on LL channel per rmnet device

CRs-Fixed: 2982506
Change-Id: I2454080d89c7a39a67004e0143463cd35772d45c
Signed-off-by: Subash Abhinov Kasiviswanathan <[email protected]>

core/rmnet_vnd.c

@@ -295,6 +295,8 @@ static const char rmnet_gstrings_stats[][ETH_GSTRING_LEN] = {
 	"Uplink priority packets",
 	"TSO packets",
 	"TSO packets arriving incorrectly",
+	"LL TSO segment success",
+	"LL TSO segment fail",
 };
 
 static const char rmnet_port_gstrings_stats[][ETH_GSTRING_LEN] = {