powerpc/prom_init: Move const structures to __initconst

As they are no longer used past the end of prom_init

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Benjamin Herrenschmidt 2018-10-15 13:49:56 +11:00 • committed by Michael Ellerman
commit d00e34b92c