MN10300: ttySM: clean up unnecessary casting

The ttySM uart data register pointers are declared as void* pointers. Change
them to u8* pointers so we don't need to use casts in the code.
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>

arch/mn10300/kernel/mn10300-serial.c

@@ -1629,12 +1629,12 @@ static void mn10300_serial_console_write(struct console *co,
 
 		while (*port->_status & SC01STR_TBF)
 			continue;
-		*(u8 *) port->_txb = ch;
+		*port->_txb = ch;
 
 		if (ch == 0x0a) {
 			while (*port->_status & SC01STR_TBF)
 				continue;
-			*(u8 *) port->_txb = 0xd;
+			*port->_txb = 0xd;
 		}
 	}
 
@@ -1759,12 +1759,12 @@ static void mn10300_serial_poll_put_char(struct uart_port *_port,
 	tmp = *port->_intr;
 
 	if (ch == 0x0a) {
-		*(u8 *) port->_txb = 0x0d;
+		*port->_txb = 0x0d;
 		while (*port->_status & SC01STR_TBF)
 			continue;
 	}
 
-	*(u8 *) port->_txb = ch;
+	*port->_txb = ch;
 	while (*port->_status & SC01STR_TBF)
 		continue;
 

arch/mn10300/kernel/mn10300-serial.h

@@ -58,8 +58,8 @@ struct mn10300_serial_port {
 	volatile u16		*_control;	/* control register pointer */
 	volatile u8		*_status;	/* status register pointer */
 	volatile u8		*_intr;		/* interrupt register pointer */
-	volatile void		*_rxb;		/* receive buffer register pointer */
-	volatile void		*_txb;		/* transmit buffer register pointer */
+	volatile u8		*_rxb;		/* receive buffer register pointer */
+	volatile u8		*_txb;		/* transmit buffer register pointer */
 	volatile u16		*_tmicr;	/* timer interrupt control register */
 	volatile u8		*_tmxmd;	/* baud rate timer mode register */
 	volatile u16		*_tmxbr;	/* baud rate timer base register */