net: ethtool: Add ethernet speed macros for higher speeds

Add speed macro's for higher ethernet speeds to be used in u-boot
networking drivers. Added Macros for speeds 14G, 20G, 25G, 40G, 50G,
56G, 100G and 200G inline with linux.
Signed-off-by: NAshok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Acked-by: NRamon Fried <rfried.dev@gmail.com>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

include/linux/ethtool.h

@@ -620,6 +620,14 @@ enum ethtool_sfeatures_retval_bits {
 #define SPEED_1000		1000
 #define SPEED_2500		2500
 #define SPEED_10000		10000
+#define SPEED_14000		14000
+#define SPEED_20000		20000
+#define SPEED_25000		25000
+#define SPEED_40000		40000
+#define SPEED_50000		50000
+#define SPEED_56000		56000
+#define SPEED_100000		100000
+#define SPEED_200000		200000
 
 /* Duplex, half or full. */
 #define DUPLEX_HALF		0x00