RFC: remove NDIS code from rsu

[Idwer Vollering]

The driver is able to bring up a connection on linux and openbsd just fine.

I would start with this, then fix the structs. This could use another
pair of eyes.

Partial draft (yes, it builds):

Index: sys/dev/usb/wlan/if_rsu.c
===================================================================
--- sys/dev/usb/wlan/if_rsu.c   (revision 287538)
+++ sys/dev/usb/wlan/if_rsu.c   (working copy)
@@ -1066,11 +1066,11 @@
        if (ic->ic_curmode == IEEE80211_MODE_11B)
                bss->networktype = htole32(NDIS802_11DS);
        else
-               bss->networktype = htole32(NDIS802_11OFDM24);
+               bss->networktype = IEEE80211_MODE_11G;
        bss->config.len = htole32(sizeof(bss->config));
        bss->config.bintval = htole32(ni->ni_intval);
        bss->config.dsconfig = htole32(ieee80211_chan2ieee(ic, ni->ni_chan));
-       bss->inframode = htole32(NDIS802_11INFRASTRUCTURE);
+       bss->inframode = IEEE80211_M_STA;
        memcpy(bss->supprates, ni->ni_rates.rs_rates,
            ni->ni_rates.rs_nrates);
        /* Write the fixed fields of the beacon frame. */
Index: sys/dev/usb/wlan/if_rsureg.h
===================================================================
--- sys/dev/usb/wlan/if_rsureg.h        (revision 287538)
+++ sys/dev/usb/wlan/if_rsureg.h        (working copy)
@@ -414,19 +414,11 @@
        uint32_t        privacy;
        int32_t         rssi;
        uint32_t        networktype;
-#define NDIS802_11FH           0
 #define NDIS802_11DS           1
-#define NDIS802_11OFDM5                2
-#define NDIS802_11OFDM24       3
-#define NDIS802_11AUTOMODE     4

        struct          ndis_802_11_configuration config;
        uint32_t        inframode;
-#define NDIS802_11IBSS                 0
-#define NDIS802_11INFRASTRUCTURE       1
 #define NDIS802_11AUTOUNKNOWN          2
-#define NDIS802_11MONITOR              3
-#define NDIS802_11APMODE               4

        uint8_t         supprates[16];
        uint32_t        ieslen;