m32r: serial: remove M32R_SIO_SHARE_IRQS

Remove an unused symbol M32R_SIO_SHARE_IRQS from drivers/serial/m32r_sio.h.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Cc: "Robert P. J. Day" <rpjday@mindspring.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/serial/m32r_sio.c

@@ -539,7 +539,7 @@ static void serial_do_unlink(struct irq_info *i, struct uart_sio_port *up)
 static int serial_link_irq_chain(struct uart_sio_port *up)
 {
 	struct irq_info *i = irq_lists + up->port.irq;
-	int ret, irq_flags = up->port.flags & UPF_SHARE_IRQ ? IRQF_SHARED : 0;
+	int ret, irq_flags = 0;
 
 	spin_lock_irq(&i->lock);
 

drivers/serial/m32r_sio.h

@@ -46,9 +46,3 @@ struct old_serial_port {
 #define PROBE_ANY	(~0)
 
 #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
-
-#ifdef CONFIG_SERIAL_SIO_SHARE_IRQ
-#define M32R_SIO_SHARE_IRQS 1
-#else
-#define M32R_SIO_SHARE_IRQS 0
-#endif