serial: bcm63xx_uart: fix compilation after "TTY: switch tty_insert_flip_char"

92a19f9c introduced a local variable
with the same name as the argument to bcm_uart_do_rx, breaking
compilation. Fix this by renaming the new variable and its uses where
expected.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Acked-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/bcm63xx_uart.c

@@ -235,7 +235,7 @@ static const char *bcm_uart_type(struct uart_port *port)
  */
 static void bcm_uart_do_rx(struct uart_port *port)
 {
-	struct tty_port *port = &port->state->port;
+	struct tty_port *tty_port = &port->state->port;
 	unsigned int max_count;
 
 	/* limit number of char read in interrupt, should not be
@@ -260,7 +260,7 @@ static void bcm_uart_do_rx(struct uart_port *port)
 			bcm_uart_writel(port, val, UART_CTL_REG);
 
 			port->icount.overrun++;
-			tty_insert_flip_char(port, 0, TTY_OVERRUN);
+			tty_insert_flip_char(tty_port, 0, TTY_OVERRUN);
 		}
 
 		if (!(iestat & UART_IR_STAT(UART_IR_RXNOTEMPTY)))
@@ -299,11 +299,11 @@ static void bcm_uart_do_rx(struct uart_port *port)
 
 
 		if ((cstat & port->ignore_status_mask) == 0)
-			tty_insert_flip_char(port, c, flag);
+			tty_insert_flip_char(tty_port, c, flag);
 
 	} while (--max_count);
 
-	tty_flip_buffer_push(port);
+	tty_flip_buffer_push(tty_port);
 }
 
 /*