staging: vt6655: Rename variable byBBPreEDRSSI

Remove byte Type encoding "by" from variable name and replace camelcase
with snakecase.

Mute checkpatch error:

CHECK: Avoid CamelCase: <byBBPreEDRSSI>
Signed-off-by: Gilbert Adikankwu <gilbertadikankwu@gmail.com>
Link: https://lore.kernel.org/r/d525f5837bb343001447646fe17746370256694f.1697495598.git.gilbertadikankwu@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/device.h

@@ -253,7 +253,7 @@ struct vnt_private {
 	unsigned char bbvga[BB_VGA_LEVEL];
 	long                    dbm_threshold[BB_VGA_LEVEL];
 
-	unsigned char byBBPreEDRSSI;
+	unsigned char bb_pre_edrssi;
 	unsigned char byBBPreEDIndex;
 
 	unsigned long dwDiagRefCount;

drivers/staging/vt6655/dpc.c

@@ -79,7 +79,7 @@ static bool vnt_rx_data(struct vnt_private *priv, struct sk_buff *skb,
 
 	RFvRSSITodBm(priv, *rssi, &rx_dbm);
 
-	priv->byBBPreEDRSSI = (u8)rx_dbm + 1;
+	priv->bb_pre_edrssi = (u8)rx_dbm + 1;
 	priv->current_rssi = *rssi;
 
 	skb_pull(skb, 4);