This patch fixes a bug where we obtain a smaller resolution than requested. 
(eg: in 640x480, only 639x479 usable pixels). 

This was due to 1 being substracted from the xres and yres vars 
two times: first in mbxfb.c and then in the macros from reg_bits.h.

This patch removes the minus ones from the mbxfb.c file. Tested and works.

Signed-off-by: Raphael Assenat <raph@8d.com>

--- mbxfb.c-disppll-workaound	2006-08-14 14:08:56.000000000 -0400
+++ ../linux-2.6.18-rc2-8d/drivers/video/mbx/mbxfb.c	2006-08-14 14:23:40.000000000 -0400
@@ -255,8 +255,8 @@
 
 	/* setup resolution */
 	gsctrl &= ~(FMsk(GSCTRL_GSWIDTH) | FMsk(GSCTRL_GSHEIGHT));
-	gsctrl |= Gsctrl_Width(info->var.xres - 1) |
-		Gsctrl_Height(info->var.yres - 1);
+	gsctrl |= Gsctrl_Width(info->var.xres) |
+		Gsctrl_Height(info->var.yres);
 	writel(gsctrl, GSCTRL);
 	udelay(1000);
 
@@ -413,8 +413,8 @@
 {
 	unsigned long gsctrl;
 
-	gsctrl = GSCTRL_GAMMA_EN | Gsctrl_Width(fbi->var.xres - 1) |
-		Gsctrl_Height(fbi->var.yres - 1);
+	gsctrl = GSCTRL_GAMMA_EN | Gsctrl_Width(fbi->var.xres) |
+		Gsctrl_Height(fbi->var.yres);
 	switch (fbi->var.bits_per_pixel) {
 	case 16:
 		if (fbi->var.green.length == 5)