staging: rtl8192e: Remove wireless modes A, N_5G from _rtl92e_hwconfig

Remove WIRELESS_MODE_N_5G and WIRELESS_MODE_A as those are not supported
by hardware and to improve readability. Combine WIRELESS_MODE_G with
default to improve readability.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/ab96af426f090ac2fe4a2536b052fcf8a2e38aa8.1679949171.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c

@@ -503,16 +503,6 @@ static void _rtl92e_hwconfig(struct net_device *dev)
 		regRATR = RATE_ALL_CCK;
 		regRRSR = RATE_ALL_CCK;
 		break;
-	case WIRELESS_MODE_A:
-		regBwOpMode = BW_OPMODE_5G | BW_OPMODE_20MHZ;
-		regRATR = RATE_ALL_OFDM_AG;
-		regRRSR = RATE_ALL_OFDM_AG;
-		break;
-	case WIRELESS_MODE_G:
-		regBwOpMode = BW_OPMODE_20MHZ;
-		regRATR = RATE_ALL_CCK | RATE_ALL_OFDM_AG;
-		regRRSR = RATE_ALL_CCK | RATE_ALL_OFDM_AG;
-		break;
 	case WIRELESS_MODE_AUTO:
 	case WIRELESS_MODE_N_24G:
 		regBwOpMode = BW_OPMODE_20MHZ;
@@ -520,12 +510,7 @@ static void _rtl92e_hwconfig(struct net_device *dev)
 			  RATE_ALL_OFDM_1SS | RATE_ALL_OFDM_2SS;
 		regRRSR = RATE_ALL_CCK | RATE_ALL_OFDM_AG;
 		break;
-	case WIRELESS_MODE_N_5G:
-		regBwOpMode = BW_OPMODE_5G;
-		regRATR = RATE_ALL_OFDM_AG | RATE_ALL_OFDM_1SS |
-			  RATE_ALL_OFDM_2SS;
-		regRRSR = RATE_ALL_OFDM_AG;
-		break;
+	case WIRELESS_MODE_G:
 	default:
 		regBwOpMode = BW_OPMODE_20MHZ;
 		regRATR = RATE_ALL_CCK | RATE_ALL_OFDM_AG;