zorro: Fix reading of proc/bus/zorro/* in small chunks

proc_bus_zorro_read() didn't take into account the current file position,
hence it always read from the start of the ConfigDev.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/drivers/zorro/proc.c b/drivers/zorro/proc.c
index 4f4ea88..cafc504 100644
--- a/drivers/zorro/proc.c
+++ b/drivers/zorro/proc.c
@@ -68,7 +68,7 @@
 	cd.cd_BoardAddr = (void *)zorro_resource_start(z);
 	cd.cd_BoardSize = zorro_resource_len(z);
 
-	if (copy_to_user(buf, &cd, nbytes))
+	if (copy_to_user(buf, (void *)&cd + pos, nbytes))
 		return -EFAULT;
 	*ppos += nbytes;