Fix loading large process images.

2MiB large pages were being used for any large page mapping, but the
page manager doesn't correctly handle them everywhere yet. Now only
allow them for offset pointers (eg MMIO space) that will never be
unmapped.

src/kernel/log.h

@@ -14,6 +14,7 @@ enum class logs
 	driver,
 	fs,
 	task,
+	paging,
 
 	max
 };