Update README

Signed-off-by: Jacob Young <jacoby@nvidia.com>

README.md

@@ -711,7 +711,8 @@ Each `ghw.NIC` struct contains the following fields:
   device
 * `ghw.NIC.Capabilities` is an array of pointers to `ghw.NICCapability` structs
   that can describe the things the NIC supports. These capabilities match the
-  returned values from the `ethtool -k <DEVICE>` call on Linux
+  returned values from the `ethtool -k <DEVICE>` call on Linux as well as the 
+  AutoNegotiation and PauseFrameUse capabilities from `ethtool`.
 * `ghw.NIC.PCIAddress` is the PCI device address of the device backing the NIC.
   this is not-nil only if the backing device is indeed a PCI device; more backing
   devices (e.g. USB) will be added in future versions.