ARM: vmlinux.lds: rearrange .init output section

Keep the various linker tables as separate output sections rather
than combining them together into one big .init section.  This
makes the 'vmlinux' easier to see what is placed where.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Tested-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>