drm/i915: Panel fitter registers need an offset on VLV

#define PP_DIVISOR	0x61210

/* Panel fitting */

#define PFIT_CONTROL	0x61230

#define PFIT_CONTROL	(dev_priv->info->display_mmio_offset + 0x61230)

#define   PFIT_ENABLE		(1 << 31)

#define   PFIT_PIPE_MASK	(3 << 29)

#define   PFIT_PIPE_SHIFT	29

#define   PFIT_SCALING_PROGRAMMED (1 << 26)

#define   PFIT_SCALING_PILLAR	(2 << 26)

#define   PFIT_SCALING_LETTER	(3 << 26)

#define PFIT_PGM_RATIOS	0x61234

#define PFIT_PGM_RATIOS	(dev_priv->info->display_mmio_offset + 0x61234)

/* Pre-965 */

#define		PFIT_VERT_SCALE_SHIFT		20

#define		PFIT_VERT_SCALE_MASK		0xfff00000

#define		PFIT_HORIZ_SCALE_SHIFT_965	0

#define		PFIT_HORIZ_SCALE_MASK_965	0x00001fff

#define PFIT_AUTO_RATIOS 0x61238

#define PFIT_AUTO_RATIOS (dev_priv->info->display_mmio_offset + 0x61238)

/* Backlight control */

#define BLC_PWM_CTL2		0x61250 /* 965+ only */