[PATCH -next] tty: serial: remove set but not used variable 'error'

[YueHaibing]

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/tty/serial/pmac_zilog.c: In function 'pmz_receive_chars':
drivers/tty/serial/pmac_zilog.c:222:30: warning:
 variable 'error' set but not used [-Wunused-but-set-variable]

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/tty/serial/pmac_zilog.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index a4ec22d..a9d4098 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -219,7 +219,7 @@ static void pmz_interrupt_control(struct uart_pmac_port 
*uap, int enable)
 static bool pmz_receive_chars(struct uart_pmac_port *uap)
 {
        struct tty_port *port;
-       unsigned char ch, r1, drop, error, flag;
+       unsigned char ch, r1, drop, flag;
        int loops = 0;
 
        /* Sanity check, make sure the old bug is no longer happening */
@@ -231,7 +231,6 @@ static bool pmz_receive_chars(struct uart_pmac_port *uap)
        port = &uap->port.state->port;
 
        while (1) {
-               error = 0;
                drop = 0;
 
                r1 = read_zsreg(uap, R1);
@@ -273,7 +272,6 @@ static bool pmz_receive_chars(struct uart_pmac_port *uap)
                uap->port.icount.rx++;
 
                if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR | BRK_ABRT)) {
-                       error = 1;
                        if (r1 & BRK_ABRT) {
                                pmz_debug("pmz: got break !\n");
                                r1 &= ~(PAR_ERR | CRC_ERR);