brcmfmac: Remove the call to "dtim_assoc" IOVAR

When STA roams from one AP to another, after roam is complete, host
driver tries to get TIM information from firmware. This is no longer
supported in the firmware & hence, this call will always fail.
This failure results in the below message being displayed on the
console all the time when roam is done.

ieee80211 phy0: brcmf_update_bss_info: wl dtim_assoc failed (-52)

Changes ensure that the host driver will no longer try to get TIM
information from firmware.

Signed-off-by: Ramesh Rangavittal <ramesh.rangavittal@infineon.com>
Signed-off-by: Chi-hsien Lin <chi-hsien.lin@infineon.com>
Signed-off-by: Ian Lin <ian.lin@infineon.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220922104140.11889-5-ian.lin@infineon.com

drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c

@@ -3164,10 +3164,7 @@ static s32 brcmf_update_bss_info(struct brcmf_cfg80211_info *cfg,
 				 struct brcmf_if *ifp)
 {
 	struct brcmf_pub *drvr = cfg->pub;
-	struct brcmf_bss_info_le *bi;
+	struct brcmf_bss_info_le *bi = NULL;
-	const struct brcmf_tlv *tim;
-	size_t ie_len;
-	u8 *ie;
 	s32 err = 0;
 
 	brcmf_dbg(TRACE, "Enter\n");
@@ -3181,29 +3178,8 @@ static s32 brcmf_update_bss_info(struct brcmf_cfg80211_info *cfg,
 		bphy_err(drvr, "Could not get bss info %d\n", err);
 		goto update_bss_info_out;
 	}
-
 	bi = (struct brcmf_bss_info_le *)(cfg->extra_buf + 4);
 	err = brcmf_inform_single_bss(cfg, bi);
-	if (err)
-		goto update_bss_info_out;
-
-	ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
-	ie_len = le32_to_cpu(bi->ie_length);
-
-	tim = brcmf_parse_tlvs(ie, ie_len, WLAN_EID_TIM);
-	if (!tim) {
-		/*
-		* active scan was done so we could not get dtim
-		* information out of probe response.
-		* so we speficially query dtim information to dongle.
-		*/
-		u32 var;
-		err = brcmf_fil_iovar_int_get(ifp, "dtim_assoc", &var);
-		if (err) {
-			bphy_err(drvr, "wl dtim_assoc failed (%d)\n", err);
-			goto update_bss_info_out;
-		}
-	}
 
 update_bss_info_out:
 	brcmf_dbg(TRACE, "Exit");