mxm_wifiex: fix the build errors with the API changes on L5.19.2 kernel

[dbudor]

L5.19.2 kernel added preliminary support to MLO link API to
include/net/cfg80211.h.
Added unused link_id parameters to
    woal_cfg80211_set_bitrate_mask(),
    woal_cfg80211_get_channel(),
    woal_cfg80211_del_beacon().

Updated access of fields  moved from wireless_dev to wireless_dev.u.ibss
in L5.19.2

struct wireless_dev {
union {
	struct {
		struct cfg80211_internal_bss *current_bss;
		struct cfg80211_chan_def chandef;
		int beacon_interval;
		u8 ssid[IEEE80211_MAX_SSID_LEN];
		u8 ssid_len;
	} ibss;
} u;
}

mxm_wifiex: made compatible with v5.19.2+ MLO link APIs see kernel commit 7a53ad13c09150076b7ddde96c2dfc5622c90b45