staging: r8188eu: convert PHY_BBConfig8188E() to common error logic

Convert the function PHY_BBConfig8188E() away from returning _FAIL or
_SUCCESS which uses inverted error logic. Use the common error logic
instead. Return 0 for success and negative values for failure.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20230115210734.18610-5-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/hal/rtl8188e_phycfg.c

@@ -478,18 +478,17 @@ PHY_BBConfig8188E(
 		struct adapter *Adapter
 	)
 {
-	int	rtStatus = _SUCCESS;
 	struct hal_data_8188e *pHalData = &Adapter->haldata;
 	u16 RegVal;
 	u8 CrystalCap;
-	int res;
+	int err;
 
 	phy_InitBBRFRegisterDefinition(Adapter);
 
 	/*  Enable BB and RF */
-	res = rtw_read16(Adapter, REG_SYS_FUNC_EN, &RegVal);
-	if (res)
-		return _FAIL;
+	err = rtw_read16(Adapter, REG_SYS_FUNC_EN, &RegVal);
+	if (err)
+		return err;
 
 	rtw_write16(Adapter, REG_SYS_FUNC_EN, (u16)(RegVal | BIT(13) | BIT(0) | BIT(1)));
 
@@ -500,14 +499,13 @@ PHY_BBConfig8188E(
 	rtw_write8(Adapter, REG_SYS_FUNC_EN, FEN_USBA | FEN_USBD | FEN_BB_GLB_RSTn | FEN_BBRSTB);
 
 	/*  Config BB and AGC */
-	if (phy_BB8188E_Config_ParaFile(Adapter))
-		rtStatus = _FAIL;
+	err = phy_BB8188E_Config_ParaFile(Adapter);
 
 	/*  write 0x24[16:11] = 0x24[22:17] = CrystalCap */
 	CrystalCap = pHalData->CrystalCap & 0x3F;
 	rtl8188e_PHY_SetBBReg(Adapter, REG_AFE_XTAL_CTRL, 0x7ff800, (CrystalCap | (CrystalCap << 6)));
 
-	return rtStatus;
+	return err;
 }
 
 static void getTxPowerIndex88E(struct adapter *Adapter, u8 channel, u8 *cckPowerLevel,

drivers/staging/r8188eu/hal/usb_halinit.c

@@ -606,9 +606,8 @@ u32 rtl8188eu_hal_init(struct adapter *Adapter)
 	/*  */
 	/* d. Initialize BB related configurations. */
 	/*  */
-	status = PHY_BBConfig8188E(Adapter);
-	if (status == _FAIL)
-		goto exit;
+	if (PHY_BBConfig8188E(Adapter))
+		return _FAIL;
 
 	if (phy_RF6052_Config_ParaFile(Adapter))
 		return _FAIL;