drm/ssd130x: Fix pitch calculation in ssd130x_fb_blit_rect()

The page height must be taken into account only for vertical coordinates
and heights, not for horizontal coordinates and widths.

Fixes: 179a790a ("drm/ssd130x: Set the page height value in the device info data")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/54deec2ec533e90544faa8c60a0c2518c58f3e9c.1689252746.git.geert@linux-m68k.org

drivers/gpu/drm/solomon/ssd130x.c

@@ -596,7 +596,7 @@ static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_m
 	rect->y1 = round_down(rect->y1, page_height);
 	rect->y2 = min_t(unsigned int, round_up(rect->y2, page_height), ssd130x->height);
 
-	dst_pitch = DIV_ROUND_UP(drm_rect_width(rect), page_height);
+	dst_pitch = DIV_ROUND_UP(drm_rect_width(rect), 8);
 
 	ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
 	if (ret)