omap: McBSP: tx_irq_completion used in rx_irq_handler

Looks like a typo from commit d6d834b010.

Signed-off-by: Scott Ellis <[e-mail]>
Acked-by: Peter Ujfalusi <[e-mail]>
Signed-off-by: Tony Lindgren <[e-mail]>

arch/arm/plat-omap/mcbsp.c

···
 		/* Writing zero to RSYNC_ERR clears the IRQ */
 		MCBSP_WRITE(mcbsp_rx, SPCR1, MCBSP_READ_CACHE(mcbsp_rx, SPCR1));
 	} else {
-		complete(&mcbsp_rx->tx_irq_completion);
+		complete(&mcbsp_rx->rx_irq_completion);
 	}
 
 	return IRQ_HANDLED;