ixgbe: E610: add discovering EEE capability

Add detecting and parsing EEE device capability.

Recently EEE functionality support has been introduced to E610 FW.
Currently ixgbe driver has no possibility to detect whether NVM
loaded on given adapter supports EEE.

There's dedicated device capability element reflecting FW support
for given EEE link speed.

Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20260430-jk-iwl-net-next-2026-04-30-v1-1-6f27ae1cd073@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c

@@ -628,6 +628,9 @@ static bool ixgbe_parse_e610_caps(struct ixgbe_hw *hw,
 			(phys_id & IXGBE_EXT_TOPO_DEV_IMG_PROG_EN) != 0;
 		break;
 	}
+	case LIBIE_AQC_CAPS_EEE:
+		caps->eee_support = (u8)number;
+		break;
 	default:
 		/* Not one of the recognized common capabilities */
 		return false;

drivers/net/ethernet/intel/ixgbe/ixgbe_type_e610.h

@@ -891,6 +891,7 @@ struct ixgbe_hw_caps {
 	u8 apm_wol_support;
 	u8 acpi_prog_mthd;
 	u8 proxy_support;
+	u8 eee_support;
 	bool nvm_update_pending_nvm;
 	bool nvm_update_pending_orom;
 	bool nvm_update_pending_netlist;

include/linux/net/intel/libie/adminq.h

@@ -196,6 +196,7 @@ LIBIE_CHECK_STRUCT_LEN(16, libie_aqc_list_caps);
 #define LIBIE_AQC_BIT_ROCEV2_LAG			BIT(0)
 #define LIBIE_AQC_BIT_SRIOV_LAG				BIT(1)
 #define LIBIE_AQC_BIT_SRIOV_AA_LAG			BIT(2)
+#define LIBIE_AQC_CAPS_EEE				0x009B
 #define LIBIE_AQC_CAPS_FLEX10				0x00F1
 #define LIBIE_AQC_CAPS_CEM				0x00F2