staging: rtl8188eu: reuse Hal_GetChnlGroup88E()

Use Hal_GetChnlGroup88E() instead of duplicating it's code
in get_rx_power_val_by_reg().
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/hal/rf.c

@@ -164,20 +164,9 @@ static void get_rx_power_val_by_reg(struct adapter *adapt, u8 channel,
 			/*  increase power diff defined by Realtek for regulatory */
 			if (hal_data->pwrGroupCnt == 1)
 				chnlGroup = 0;
-			if (hal_data->pwrGroupCnt >= hal_data->PGMaxGroup) {
-				if (channel < 3)
-					chnlGroup = 0;
-				else if (channel < 6)
-					chnlGroup = 1;
-				else if (channel < 9)
-					chnlGroup = 2;
-				else if (channel < 12)
-					chnlGroup = 3;
-				else if (channel < 14)
-					chnlGroup = 4;
-				else if (channel == 14)
-					chnlGroup = 5;
-			}
+			if (hal_data->pwrGroupCnt >= hal_data->PGMaxGroup)
+				Hal_GetChnlGroup88E(channel, &chnlGroup);
+
 			write_val = hal_data->MCSTxPowerLevelOriginalOffset[chnlGroup][index+(rf ? 8 : 0)] +
 					((index < 2) ? powerbase0[rf] : powerbase1[rf]);
 			break;

drivers/staging/rtl8188eu/hal/rtl8188e_hal_init.c

@@ -373,7 +373,7 @@ static void Hal_ReadPowerValueFromPROM_8188E(struct txpowerinfo24g *pwrInfo24G,
 	}
 }
 
-static void Hal_GetChnlGroup88E(u8 chnl, u8 *group)
+void Hal_GetChnlGroup88E(u8 chnl, u8 *group)
 {
 	if (chnl < 3)			/*  Channel 1-2 */
 		*group = 0;

drivers/staging/rtl8188eu/include/rtl8188e_hal.h

@@ -329,6 +329,8 @@ struct hal_data_8188e {
 	u8	UsbRxAggPageTimeout;
 };
 
+void Hal_GetChnlGroup88E(u8 chnl, u8 *group);
+
 /*  rtl8188e_hal_init.c */
 void _8051Reset88E(struct adapter *padapter);
 void rtl8188e_InitializeFirmwareVars(struct adapter *padapter);