serial: sh-sci: Remove bogus sci_handle_fifo_overrun() call on (H)SCIF

Commit 8b6ff84c ("serial: sh-sci: Fix R-Car SCIF and HSCIF
overrun handling") added overrun handling for (H)SCIF using the SCLSR
register, but also accidentally added a bogus call to
sci_handle_fifo_overrun() in the receive interrupt path.

Remove it again.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/sh-sci.c

@@ -1066,11 +1066,8 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
 	 * DR flags
 	 */
 	if (((ssr_status & SCxSR_RDxF(port)) || s->chan_rx) &&
-	    (scr_status & SCSCR_RIE)) {
-		if (port->type == PORT_SCIF || port->type == PORT_HSCIF)
-			sci_handle_fifo_overrun(port);
+	    (scr_status & SCSCR_RIE))
 		ret = sci_rx_interrupt(irq, ptr);
-	}
 
 	/* Error Interrupt */
 	if ((ssr_status & SCxSR_ERRORS(port)) && err_enabled)