mac80211: Drop ath10k workaround for providing calibration data

Ath10k has now a proper method of providing calibration data via
the kernel firmware API. This patch can be dropped as all boards
now use the proper method.

Signed-off-by: Matti Laakso <malaakso@elisanet.fi>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46245 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/kernel/mac80211/patches/920-ath10k_allow_fallback_to_board_bin_on_empty_otp_stream.patch

---- a/drivers/net/wireless/ath/ath10k/core.c
-+++ b/drivers/net/wireless/ath/ath10k/core.c
-@@ -391,8 +391,13 @@ static int ath10k_download_and_run_otp(s
- 	if (!(skip_otp || test_bit(ATH10K_FW_FEATURE_IGNORE_OTP_RESULT,
- 				   ar->fw_features))
- 	    && result != 0) {
--		ath10k_err(ar, "otp calibration failed: %d", result);
--		return -EINVAL;
-+		if (result == 2) {
-+			ath10k_warn(ar, "otp stream is empty, using board.bin contents");
-+			return 0;
-+		} else {
-+			ath10k_err(ar, "otp calibration failed: %d", result);
-+			return -EINVAL;
-+		}
- 	}
- 
- 	return 0;