staging: rtl8712: Remove unnecessary alias of printk()

This module defines four alias for printk(). Removed them
all, because they are not used anywhere else in the driver.
Converted the only exception to the explicit use of printk().

Signed-off-by: Fabio M. De Francesco <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/rtl8712/rtl8712_cmd.c

···
 		/* Here we only set bPbcPressed to true
 		 * After trigger PBC, the variable will be set to false
 		 */
-		DBG_8712("CheckPbcGPIO - PBC is pressed !!!!\n");
+		printk(KERN_DEBUG "CheckPbcGPIO - PBC is pressed !!!!\n");
 		/* 0 is the default value and it means the application monitors
 		 * the HW PBC doesn't provide its pid to driver.
 		 */

drivers/staging/rtl8712/rtl871x_debug.h

···
 	#undef	_MODULE_DEFINE_
 #endif
 
-#define _dbgdump	printk
-
-#define MSG_8712(x, ...) {}
-
-#define DBG_8712(x, ...)  {}
-
-#define WRN_8712(x, ...)  {}
-
-#define ERR_8712(x, ...)  {}
-
-#undef MSG_8712
-#define MSG_8712 _dbgdump
-
-#undef DBG_8712
-#define DBG_8712 _dbgdump
-
-#undef WRN_8712
-#define WRN_8712 _dbgdump
-
-#undef ERR_8712
-#define ERR_8712 _dbgdump
-
 #endif	/*__RTL871X_DEBUG_H__*/
-