brcmfmac: fix sparse warnings

Following sparse warning is fixed:
drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c:2518:21: warning: symbol 'brcmf_find_wpaie' was not declared. Should it be static?
drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c:3768:1: warning: symbol 'brcmf_set_management_ie' was not declared. Should it be static?
Signed-off-by: NFranky Lin <frankyl@broadcom.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c

@@ -2674,7 +2674,7 @@ brcmf_tlv_has_ie(u8 *ie, u8 **tlvs, u32 *tlvs_len,
 	return false;
 }
 
-struct brcmf_vs_tlv *
+static struct brcmf_vs_tlv *
 brcmf_find_wpaie(u8 *parse, u32 len)
 {
 	struct brcmf_tlv *ie;
@@ -3963,7 +3963,7 @@ brcmf_vndr_ie(u8 *iebuf, s32 pktflag, u8 *ie_ptr, u32 ie_len, s8 *add_del_cmd)
 	return ie_len + VNDR_IE_HDR_SIZE;
 }
 
-s32
+static s32
 brcmf_set_management_ie(struct brcmf_cfg80211_info *cfg,
 			struct net_device *ndev, s32 bssidx, s32 pktflag,
 			u8 *vndr_ie_buf, u32 vndr_ie_len)