tty: serial: bcm63xx_uart: define UART_REG_SIZE constant

The bcm63xx_uart driver uses RSET_UART_SIZE which is a constant defined
for MIPS-based BCM63xx platforms, pull this constant value from the
MIPS-specific header and put it in include/linux/serial_bcm63xx.h to
make the driver platform agnostic.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/bcm63xx_uart.c

@@ -589,7 +589,7 @@ static int bcm_uart_request_port(struct uart_port *port)
 {
 	unsigned int size;
 
-	size = RSET_UART_SIZE;
+	size = UART_REG_SIZE;
 	if (!request_mem_region(port->mapbase, size, "bcm63xx")) {
 		dev_err(port->dev, "Memory region busy\n");
 		return -EBUSY;
@@ -609,7 +609,7 @@ static int bcm_uart_request_port(struct uart_port *port)
  */
 static void bcm_uart_release_port(struct uart_port *port)
 {
-	release_mem_region(port->mapbase, RSET_UART_SIZE);
+	release_mem_region(port->mapbase, UART_REG_SIZE);
 	iounmap(port->membase);
 }
 

include/linux/serial_bcm63xx.h

@@ -116,4 +116,6 @@
 					UART_FIFO_PARERR_MASK |		\
 					UART_FIFO_BRKDET_MASK)
 
+#define UART_REG_SIZE			24
+
 #endif /* _LINUX_SERIAL_BCM63XX_H */