reverted:
--- b/drivers/net/wireless/ath/ath11k/core.c
+++ a/drivers/net/wireless/ath/ath11k/core.c
@@ -732,7 +732,7 @@
 		.name = "qca2066 hw2.1",
 		.hw_rev = ATH11K_HW_QCA2066_HW21,
 		.fw = {
+			.dir = "QCA2066/hw2.1",
-			.dir = "QCA206X/hw2.1",
 			.board_size = 256 * 1024,
 			.cal_offset = 128 * 1024,
 		},