mtd: sh_flctl: Add FLHOLDCR register

Add a register used in new FLCTL hardware and a feature flag for it.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c
index 48d5da0..d0f1f3c 100644
--- a/drivers/mtd/nand/sh_flctl.c
+++ b/drivers/mtd/nand/sh_flctl.c
@@ -693,6 +693,8 @@
 	case 0:
 		flctl->flcmncr_base |= CE0_ENABLE;
 		writel(flctl->flcmncr_base, FLCMNCR(flctl));
+		if (flctl->holden)
+			writel(HOLDEN, FLHOLDCR(flctl));
 		break;
 	default:
 		BUG();
@@ -849,6 +851,7 @@
 	flctl->pdev = pdev;
 	flctl->flcmncr_base = pdata->flcmncr_val;
 	flctl->hwecc = pdata->has_hwecc;
+	flctl->holden = pdata->use_holden;
 
 	nand->options = NAND_NO_AUTOINCR;