Actually there are three commits which changed the ipq8072-301w.dts file. It is changed/adapted for the NSS builds too.
Did you try to load the firmware from userspace. Although it was reported as unsuccessful.

/lib/firmware/marvell/AQR-G4_v5.4.C-AQR_CIG_WF-1945_0x0_ID44778_VER1630.cld
/lib/firmware/marvell/AQR-G4_v5.4.C-AQR_CIG_WF-1945_0x8_ID44776_VER1630.cld

I've tried this too but I've got the same error as the original poster.