atmel_lcdfb: set ypanstep to 1 and enable y-panning on AT91

Panning in the y-direction can be done by simply changing the DMA base
address.  This code is already in place, but FBIOPAN_DISPLAY will
currently fail because ypanstep is 0.

Set ypanstep to 1 to indicate that we do support y-panning and also set
the necessary acceleration flags on AT91 (AVR32 already have them.)
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/atmel_lcdfb.c

@@ -39,7 +39,9 @@
 #endif
 
 #if defined(CONFIG_ARCH_AT91)
-#define	ATMEL_LCDFB_FBINFO_DEFAULT	FBINFO_DEFAULT
+#define	ATMEL_LCDFB_FBINFO_DEFAULT	(FBINFO_DEFAULT \
+					 | FBINFO_PARTIAL_PAN_OK \
+					 | FBINFO_HWACCEL_YPAN)
 
 static inline void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
 					struct fb_var_screeninfo *var)
@@ -177,7 +179,7 @@ static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = {
 	.type		= FB_TYPE_PACKED_PIXELS,
 	.visual		= FB_VISUAL_TRUECOLOR,
 	.xpanstep	= 0,
-	.ypanstep	= 0,
+	.ypanstep	= 1,
 	.ywrapstep	= 0,
 	.accel		= FB_ACCEL_NONE,
 };