staging: r8188eu: remove local variable Indexforchannel

The local variable Indexforchannel in function
odm_TXPowerTrackingCallback_ThermalMeter_8188E() is initilaized to 0
and never changed. Remove the variable and replace its usage with 0.
Acked-by: Phillip Potter <phil@philpotter.co.uk>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210829175624.5915-1-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/hal/HalPhyRf_8188e.c

@@ -110,7 +110,6 @@ odm_TXPowerTrackingCallback_ThermalMeter_8188E(
 	bool is2t = false;
 
 	u8 OFDM_min_index = 6, rf; /* OFDM BB Swing should be less than +3.0dB, which is required by Arthur */
-	u8 Indexforchannel = 0/*GetRightChnlPlaceforIQK(pHalData->CurrentChannel)*/;
 	s8 OFDM_index_mapping[2][index_mapping_NUM_88E] = {
 		{0, 0, 2, 3, 4, 4, 		/* 2.4G, decrease power */
 		5, 6, 7, 7, 8, 9,
@@ -280,8 +279,8 @@ odm_TXPowerTrackingCallback_ThermalMeter_8188E(
 
 				/* Adujst OFDM Ant_A according to IQK result */
 				ele_D = (OFDMSwingTable[(u8)OFDM_index[0]] & 0xFFC00000) >> 22;
-				X = dm_odm->RFCalibrateInfo.IQKMatrixRegSetting[Indexforchannel].Value[0][0];
-				Y = dm_odm->RFCalibrateInfo.IQKMatrixRegSetting[Indexforchannel].Value[0][1];
+				X = dm_odm->RFCalibrateInfo.IQKMatrixRegSetting[0].Value[0][0];
+				Y = dm_odm->RFCalibrateInfo.IQKMatrixRegSetting[0].Value[0][1];
 
 				/*  Revse TX power table. */
 				dm_odm->BbSwingIdxOfdm		= (u8)OFDM_index[0];
@@ -315,8 +314,8 @@ odm_TXPowerTrackingCallback_ThermalMeter_8188E(
 					ele_D = (OFDMSwingTable[(u8)OFDM_index[1]] & 0xFFC00000) >> 22;
 
 					/* new element A = element D x X */
-					X = dm_odm->RFCalibrateInfo.IQKMatrixRegSetting[Indexforchannel].Value[0][4];
-					Y = dm_odm->RFCalibrateInfo.IQKMatrixRegSetting[Indexforchannel].Value[0][5];
+					X = dm_odm->RFCalibrateInfo.IQKMatrixRegSetting[0].Value[0][4];
+					Y = dm_odm->RFCalibrateInfo.IQKMatrixRegSetting[0].Value[0][5];
 
 					if ((X != 0) && (*dm_odm->pBandType == ODM_BAND_2_4G)) {
 						if ((X & 0x00000200) != 0)	/* consider minus */