[rdkb][common][app][Fix mt7915 can't up bring up normally]

[Description]
1. remove bandwidth 160Mhz related options from vht_cap in hostapd-5G-7915.conf

[Release-log]

Change-Id: I9bf730cc3a77589982f07c31afbcc29f5ebcd01b
diff --git a/recipes-wifi/hostapd/files/hostapd-5G-7915.conf b/recipes-wifi/hostapd/files/hostapd-5G-7915.conf
index 00cd348..e56ebcc 100644
--- a/recipes-wifi/hostapd/files/hostapd-5G-7915.conf
+++ b/recipes-wifi/hostapd/files/hostapd-5G-7915.conf
@@ -19,7 +19,7 @@
 ieee80211ac=1
 vht_oper_chwidth=1
 vht_oper_centr_freq_seg0_idx=42
-vht_capab=[RXLDPC][SHORT-GI-80][SHORT-GI-160][TX-STBC-2BY1][SU-BEAMFORMER][SU-BEAMFORMEE][MU-BEAMFORMER][MU-BEAMFORMEE][RX-ANTENNA-PATTERN][TX-ANTENNA-PATTERN][RX-STBC-1][SOUNDING-DIMENSION-4][BF-ANTENNA-4][VHT160][MAX-MPDU-7991][MAX-A-MPDU-LEN-EXP7]
+vht_capab=[RXLDPC][SHORT-GI-80][TX-STBC-2BY1][SU-BEAMFORMER][SU-BEAMFORMEE][MU-BEAMFORMER][MU-BEAMFORMEE][RX-ANTENNA-PATTERN][TX-ANTENNA-PATTERN][RX-STBC-1][SOUNDING-DIMENSION-4][BF-ANTENNA-4][MAX-MPDU-7991][MAX-A-MPDU-LEN-EXP7]
 
 ieee80211ax=1
 he_oper_chwidth=1