i810fb: fix wrong pixclock for discrete mode selection

From: Krzysztof Helt <[email protected]>

If the i810fb driver is configured for use only predefined discrete video modes
the wrong pixclock value is used. The par->regs.pixclock value is a value from
the previous mode when a video mode is switched. It results in unreadable screen
if the old video mode has higher resolution and the new mode with the old (high)
pixclock is outside attached monitor's specs.

Signed-off-by: Krzysztof Helt <[email protected]>
---
I have noticed this testing the patch named "i810fb: Fix stack exploding".

This patch requires my patch send to Alan Cox and Andrew Morton 
named "i810fb: Fix stack exploding".

--- drivers/video/i810/i810_dvt.c~	2009-11-17 19:38:11.002864450 +0100
+++ drivers/video/i810/i810_dvt.c	2009-11-19 18:48:52.518846238 +0100
@@ -233,7 +233,7 @@ static int i810fb_find_best_mode(u32 xre
 void i810fb_encode_registers(const struct fb_var_screeninfo *var,
 			     struct i810fb_par *par, u32 xres, u32 yres)
 {
-	u32 i_best = i810fb_find_best_mode(xres, yres, par->regs.pixclock);
+	u32 i_best = i810fb_find_best_mode(xres, yres, var->pixclock);
 
 	par->regs = std_modes[i_best];
 

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