linux-firmware: add firmware for en8811h 2.5G ethernet phy

This patch adds firmware files for airoha en8811h 2.5G ethernet phy.
Refer to https://www.airoha.com/products/p/tKkm7DPXi5m6wY2D for more
product information.

Signed-off-by: SkyLake.Huang <skylake.huang@mediatek.com>
Signed-off-by: Lucien.Jheng <lucien.jheng@airoha.com>

LICENSE.airoha

@@ -0,0 +1,9 @@
+Airoha Inc. grants permission to use and redistribute aforementioned firmware
+files for the use with devices containing Airoha chipsets, but not as part of
+the Linux kernel or in any other form which would require these files themselves
+to be covered by the terms of the GNU General Public License or the GNU Lesser
+General Public License.
+
+These firmware files are distributed in the hope that they will be useful, but
+are provided WITHOUT ANY WARRANTY, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTY
+OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

WHENCE

@@ -1951,6 +1951,15 @@ Licence: Redistributable. See LICENSE.radeon for details.
 
 --------------------------------------------------------------------------
 
+Driver: en8811h - Airoha 2.5G Ethernet Phy
+
+File: airoha/EthMD32.dm.bin
+File: airoha/EthMD32.DSP.bin
+
+Licence: Redistributable. See LICENSE.airoha for details.
+
+--------------------------------------------------------------------------
+
 Driver: amdgpu - AMD Radeon
 
 File: amdgpu/tahiti_ce.bin