net: ethtool: add ethtool COALESCE_RX_CQE_FRAMES/NSECS

Add two parameters for drivers supporting Rx CQE coalescing /
descriptor writeback.

ETHTOOL_A_COALESCE_RX_CQE_FRAMES:
Maximum number of frames that can be coalesced into a CQE or
writeback.

ETHTOOL_A_COALESCE_RX_CQE_NSECS:
Max time in nanoseconds after the first packet arrival in a
coalesced CQE or writeback to be sent.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Link: https://patch.msgid.link/20260317191826.1346111-2-haiyangz@linux.microsoft.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/netlink/specs/ethtool.yaml

@@ -857,6 +857,12 @@ attribute-sets:
         name: tx-profile
         type: nest
         nested-attributes: profile
+      -
+        name: rx-cqe-frames
+        type: u32
+      -
+        name: rx-cqe-nsecs
+        type: u32
 
   -
     name: pause-stat
@@ -2253,6 +2259,8 @@ operations:
             - tx-aggr-time-usecs
             - rx-profile
             - tx-profile
+            - rx-cqe-frames
+            - rx-cqe-nsecs
       dump: *coalesce-get-op
     -
       name: coalesce-set