qcacld-3.0: Fix compilation issue in sme

Declare sme_update_bfer_eht_cap() api static to fix
compilation issue.

Change-Id: I7061860d3cd8fdd9be532e650af7b7fc267843a5
CRs-Fixed: 3018138

core/sme/src/common/sme_api.c

@@ -4593,7 +4593,7 @@ static void sme_update_bfer_he_cap(struct wma_tgt_cfg *cfg)
 #endif
 
 #ifdef WLAN_FEATURE_11BE
-void sme_update_bfer_eht_cap(struct wma_tgt_cfg *cfg)
+static void sme_update_bfer_eht_cap(struct wma_tgt_cfg *cfg)
 {
 	cfg->eht_cap_5g.su_beamformer = 0;
 }