OMAP: DISPC: Enable dispc wake up capability

Without wakeup enable omap doesn't wake up on dispc interrupts. This
causes problems in a case where mpu is in sleep state and dispc
interrupt fires.
Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/video/omap/dispc.c

@@ -1392,10 +1392,10 @@ static int omap_dispc_init(struct omapfb_device *fbdev, int ext_mode,
 		enable_digit_clocks(0);
 	}
 
-	/* Enable smart idle and autoidle */
+	/* Enable smart standby/idle, autoidle and wakeup */
 	l = dispc_read_reg(DISPC_SYSCONFIG);
 	l &= ~((3 << 12) | (3 << 3));
-	l |= (2 << 12) | (2 << 3) | (1 << 0);
+	l |= (2 << 12) | (2 << 3) | (1 << 2) | (1 << 0);
 	dispc_write_reg(DISPC_SYSCONFIG, l);
 	omap_writel(1 << 0, DSS_BASE + DSS_SYSCONFIG);