netlink: specs: Expand the PSE netlink command with C33 pw-limit attributes

Expand the c33 PSE attributes with power limit to be able to set and get
the PSE Power Interface power limit.

./ynl/cli.py --spec netlink/specs/ethtool.yaml --no-schema --do pse-get
             --json '{"header":{"dev-name":"eth1"}}'
{'c33-pse-actual-pw': 1700,
 'c33-pse-admin-state': 3,
 'c33-pse-avail-pw-limit': 97500,
 'c33-pse-pw-class': 4,
 'c33-pse-pw-d-status': 4,
 'c33-pse-pw-limit-ranges': [{'max': 18100, 'min': 15000},
                             {'max': 38000, 'min': 30000},
                             {'max': 65000, 'min': 60000},
                             {'max': 97500, 'min': 90000}],
 'header': {'dev-index': 5, 'dev-name': 'eth1'}}

./ynl/cli.py --spec netlink/specs/ethtool.yaml --no-schema --do pse-set
             --json '{"header":{"dev-name":"eth1"},
                      "c33-pse-avail-pw-limit":19000}'
None

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20240704-feature_poe_power_cap-v6-6-320003204264@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/netlink/specs/ethtool.yaml

@@ -939,6 +939,15 @@ attribute-sets:
       -
         name: power-mode
         type: u8
+  -
+    name: c33-pse-pw-limit
+    attributes:
+      -
+        name: min
+        type: u32
+      -
+        name: max
+        type: u32
   -
     name: pse
     attributes:
@@ -987,6 +996,16 @@ attribute-sets:
         name: c33-pse-ext-substate
         type: u32
         name-prefix: ethtool-a-
+      -
+        name: c33-pse-avail-pw-limit
+        type: u32
+        name-prefix: ethtool-a-
+      -
+        name: c33-pse-pw-limit-ranges
+        name-prefix: ethtool-a-
+        type: nest
+        multi-attr: true
+        nested-attributes: c33-pse-pw-limit
   -
     name: rss
     attributes:
@@ -1708,6 +1727,8 @@ operations:
             - c33-pse-actual-pw
             - c33-pse-ext-state
             - c33-pse-ext-substate
+            - c33-pse-avail-pw-limit
+            - c33-pse-pw-limit-ranges
       dump: *pse-get-op
     -
       name: pse-set
@@ -1721,6 +1742,7 @@ operations:
             - header
             - podl-pse-admin-control
             - c33-pse-admin-control
+            - c33-pse-avail-pw-limit
     -
       name: rss-get
       doc: Get RSS params.