tty: serial: msm: Fix 'else is not generally useful after a break or return' warning

fixed below checkpatch.pl warning:

WARNING: else is not generally useful after a break or return
Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/msm_serial.c

@@ -700,7 +700,7 @@ static int msm_poll_get_char_single(struct uart_port *port)
 
 	if (!(msm_read(port, UART_SR) & UART_SR_RX_READY))
 		return NO_POLL_CHAR;
-	else
+
 	return msm_read(port, rf_reg) & 0xff;
 }