serial: ucc_uart: access __be32 field using be32_to_cpu

The buf member of struct qe_bd is a __be32, so to make this work on
little-endian hosts, use be32_to_cpu when reading it.
Reviewed-by: Timur Tabi <timur@kernel.org>
Acked-by: Timur Tabi <timur@kernel.org>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Li Yang <leoyang.li@nxp.com>

drivers/tty/serial/ucc_uart.c

@@ -343,7 +343,7 @@ static int qe_uart_tx_pump(struct uart_qe_port *qe_port)
 		/* Pick next descriptor and fill from buffer */
 		bdp = qe_port->tx_cur;
 
-		p = qe2cpu_addr(bdp->buf, qe_port);
+		p = qe2cpu_addr(be32_to_cpu(bdp->buf), qe_port);
 
 		*p++ = port->x_char;
 		qe_iowrite16be(1, &bdp->length);
@@ -371,7 +371,7 @@ static int qe_uart_tx_pump(struct uart_qe_port *qe_port)
 	while (!(qe_ioread16be(&bdp->status) & BD_SC_READY) &&
 	       (xmit->tail != xmit->head)) {
 		count = 0;
-		p = qe2cpu_addr(bdp->buf, qe_port);
+		p = qe2cpu_addr(be32_to_cpu(bdp->buf), qe_port);
 		while (count < qe_port->tx_fifosize) {
 			*p++ = xmit->buf[xmit->tail];
 			xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
@@ -491,7 +491,7 @@ static void qe_uart_int_rx(struct uart_qe_port *qe_port)
 		}
 
 		/* get pointer */
-		cp = qe2cpu_addr(bdp->buf, qe_port);
+		cp = qe2cpu_addr(be32_to_cpu(bdp->buf), qe_port);
 
 		/* loop through the buffer */
 		while (i-- > 0) {