drm/i915/dsi: lose the loose 666 format name in favor of packed

The enum mipi_dsi_pixel_format defines MIPI_DSI_FMT_RGB666 for the
"loose" 24 bpp format and MIPI_DSI_FMT_RGB666_PACKED for the 18 bpp
format. We have this the other way round, defining a loose version for
24 bpp.

Follow suit with what's in enum mipi_dsi_pixel_format to avoid future
confusion. Rename

VID_MODE_FORMAT_RGB666 -> VID_MODE_FORMAT_RGB666_PACKED
VID_MODE_FORMAT_RGB666_LOOSE -> VID_MODE_FORMAT_RGB666

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458123700-16003-1-git-send-email-jani.nikula@intel.com

drivers/gpu/drm/i915/i915_reg.h

@@ -7887,8 +7887,8 @@ enum skl_disp_power_wells {
 #define  VID_MODE_FORMAT_MASK				(0xf << 7)
 #define  VID_MODE_NOT_SUPPORTED				(0 << 7)
 #define  VID_MODE_FORMAT_RGB565				(1 << 7)
-#define  VID_MODE_FORMAT_RGB666				(2 << 7)
-#define  VID_MODE_FORMAT_RGB666_LOOSE			(3 << 7)
+#define  VID_MODE_FORMAT_RGB666_PACKED			(2 << 7)
+#define  VID_MODE_FORMAT_RGB666				(3 << 7)
 #define  VID_MODE_FORMAT_RGB888				(4 << 7)
 #define  CMD_MODE_CHANNEL_NUMBER_SHIFT			5
 #define  CMD_MODE_CHANNEL_NUMBER_MASK			(3 << 5)

drivers/gpu/drm/i915/intel_dsi_pll.c

@@ -37,10 +37,10 @@ int dsi_pixel_format_bpp(int pixel_format)
 	switch (pixel_format) {
 	default:
 	case VID_MODE_FORMAT_RGB888:
-	case VID_MODE_FORMAT_RGB666_LOOSE:
+	case VID_MODE_FORMAT_RGB666:
 		bpp = 24;
 		break;
-	case VID_MODE_FORMAT_RGB666:
+	case VID_MODE_FORMAT_RGB666_PACKED:
 		bpp = 18;
 		break;
 	case VID_MODE_FORMAT_RGB565: