staging: vt6655: merge two switch cases in s_uGetDataDuration

This patch will reuse code for two cases.

Signed-off-by: Matej Dujava <mdujava@kocurkovo.cz>
Link: https://lore.kernel.org/r/1588512552-12297-2-git-send-email-mdujava@kocurkovo.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/rxtx.c

@@ -296,40 +296,6 @@ s_uGetDataDuration(
 		break;
 
 	case DATADUR_A_F0:    /* DATADUR_A_F0 */
-		if (((uMACfragNum == 1)) || bLastFrag) {/* Non Frag or Last Frag */
-			if (bNeedAck) {
-				uAckTime = bb_get_frame_time(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
-				return pDevice->uSIFS + uAckTime;
-			} else {
-				return 0;
-			}
-		} else { /* First Frag or Mid Frag */
-			if (wRate < RATE_18M)
-				wRate = RATE_18M;
-			else if (wRate > RATE_54M)
-				wRate = RATE_54M;
-
-			if (byFBOption == AUTO_FB_0) {
-				uNextPktTime = s_uGetTxRsvTime(pDevice,
-							       byPktType, len,
-							       wFB_Opt0[FB_RATE0][wRate - RATE_18M],
-							       bNeedAck);
-			} else {
-				uNextPktTime = s_uGetTxRsvTime(pDevice,
-							       byPktType, len,
-							       wFB_Opt1[FB_RATE0][wRate - RATE_18M],
-							       bNeedAck);
-			}
-
-			if (bNeedAck) {
-				uAckTime = bb_get_frame_time(pDevice->byPreambleType,
-							     byPktType, 14,
-							     pDevice->byTopOFDMBasicRate);
-			}
-			return pDevice->uSIFS + uAckTime + uNextPktTime;
-		}
-		break;
-
 	case DATADUR_A_F1:    /* DATADUR_A_F1 */
 		if (((uMACfragNum == 1)) || bLastFrag) { /* Non Frag or Last Frag */
 			if (bNeedAck) {