Apply a consistent format to vmlinux.lds.
The file is now to some degree readable.

In addition move several labels inside the braces
such that they reflect the actual start address of a section.

Without this the label would not reflect if ld added alignment.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>