staging: rtl8192u: fix RT_TRACE() in r8190_rtl8256.c

use MACRO __func__ instead of the literal names for RT_TRACE()
in phy_set_rf8256_bandwidth() and phy_rf8256_config_para_file(),
as reported by scripts/checkpatch.pl.
Signed-off-by: Du Cheng <ducheng2@gmail.com>
Link: https://lore.kernel.org/r/20210219150527.8358-1-ducheng2@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/r8190_rtl8256.c

@@ -73,11 +73,11 @@ void phy_set_rf8256_bandwidth(struct net_device *dev, enum ht_channel_width Band
 					else
 						rtl8192_phy_SetRFReg(dev, (enum rf90_radio_path_e)eRFPath, 0x14, bMask12Bits, 0x5ab);
 				} else {
-					RT_TRACE(COMP_ERR, "phy_set_rf8256_bandwidth(): unknown hardware version\n");
+					RT_TRACE(COMP_ERR, "%s(): unknown hardware version\n", __func__);
 					}
 				break;
 		default:
-				RT_TRACE(COMP_ERR, "phy_set_rf8256_bandwidth(): unknown Bandwidth: %#X\n", Bandwidth);
+				RT_TRACE(COMP_ERR, "%s(): unknown Bandwidth: %#X\n", __func__, Bandwidth);
 				break;
 		}
 	}
@@ -213,7 +213,7 @@ static void phy_rf8256_config_para_file(struct net_device *dev)
 		}
 
 		if (ret) {
-			RT_TRACE(COMP_ERR, "phy_rf8256_config_para_file():Radio[%d] Fail!!", eRFPath);
+			RT_TRACE(COMP_ERR, "%s():Radio[%d] Fail!!", __func__, eRFPath);
 			goto phy_RF8256_Config_ParaFile_Fail;
 		}
 	}