GOOGLE/SNOW: fix stupid paren error

This simple error led to corrupted graphics.
How annoying.

Change-Id: I2295c0df0f1d16014a603dc5d66bd4d72f3fb7c9
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/3120
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: build bot (Jenkins)
diff --git a/src/cpu/samsung/exynos5250/cpu.c b/src/cpu/samsung/exynos5250/cpu.c
index 09b670e..e122413 100644
--- a/src/cpu/samsung/exynos5250/cpu.c
+++ b/src/cpu/samsung/exynos5250/cpu.c
@@ -68,7 +68,7 @@
 	vi.cmap = (void *)lcdbase;
 
 	lcdbase += 64*KiB;
-	mmio_resource(dev, 1, lcdbase/KiB, fb_size + (KiB-1)/KiB);
+	mmio_resource(dev, 1, lcdbase/KiB, (fb_size + KiB - 1)/KiB);
 	printk(BIOS_DEBUG,
 	       "Initializing exynos VGA, base %p\n",(void *)lcdbase);
 	ret = lcd_ctrl_init(&vi, &panel, (void *)lcdbase);