staging: r8188eu: set path a explicitly

We've already limited the rtw_wx_write_rf function to RF_PATH_A in commit
3b011b09 ("staging: r8188eu: limit rf register writes to path a").

Set RF_PATH_A explicitly when we call rtl8188e_PHY_SetRFReg. This will
make it easier later to verify that all callers of rtl8188e_PHY_SetRFReg
use path a.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220212161737.381841-2-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/os_dep/ioctl_linux.c

@@ -2088,7 +2088,7 @@ static int rtw_wx_write_rf(struct net_device *dev,
 
 	addr = *((u32 *)extra + 1);
 	data32 = *((u32 *)extra + 2);
-	rtl8188e_PHY_SetRFReg(padapter, path, addr, 0xFFFFF, data32);
+	rtl8188e_PHY_SetRFReg(padapter, RF_PATH_A, addr, 0xFFFFF, data32);
 
 	return 0;
 }