staging: r8188eu: remove local BIT macro

The r8188eu driver defines a local BIT(x) macro. Remove this local macro
and use the one from include/linux/bits.h.

The global BIT macro returns an unsigned long value, the removed local
BIT macro used a signed int.

DYNAMIC_BB_DYNAMIC_TXPWR is defined as BIT(2), ~DYNAMIC_BB_DYNAMIC_TXPWR
is passed to Switch_DM_Func as a u32 parameter. We need a cast in this
case as ~DYNAMIC_BB_DYNAMIC_TXPWR is a 64-bit value on x86_64 systems.
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220319180342.3143734-1-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_wlan_util.c

@@ -1276,13 +1276,13 @@ void update_IOT_info(struct adapter *padapter)
 		pmlmeinfo->turboMode_cts2self = 0;
 		pmlmeinfo->turboMode_rtsen = 1;
 		/* disable high power */
-		Switch_DM_Func(padapter, (~DYNAMIC_BB_DYNAMIC_TXPWR), false);
+		Switch_DM_Func(padapter, (u32)(~DYNAMIC_BB_DYNAMIC_TXPWR), false);
 		break;
 	case HT_IOT_PEER_REALTEK:
 		/* rtw_write16(padapter, 0x4cc, 0xffff); */
 		/* rtw_write16(padapter, 0x546, 0x01c0); */
 		/* disable high power */
-		Switch_DM_Func(padapter, (~DYNAMIC_BB_DYNAMIC_TXPWR), false);
+		Switch_DM_Func(padapter, (u32)(~DYNAMIC_BB_DYNAMIC_TXPWR), false);
 		break;
 	default:
 		pmlmeinfo->turboMode_cts2self = 0;

drivers/staging/r8188eu/include/wifi.h

@@ -4,14 +4,9 @@
 #ifndef _WIFI_H_
 #define _WIFI_H_
 
+#include <linux/bits.h>
 #include <linux/ieee80211.h>
 
-#ifdef BIT
-/* error	"BIT define occurred earlier elsewhere!\n" */
-#undef BIT
-#endif
-#define BIT(x)	(1 << (x))
-
 #define WLAN_ETHHDR_LEN		14
 #define WLAN_HDR_A3_LEN		24
 #define WLAN_HDR_A3_QOS_LEN	26