powerpc/prom_init: get rid of PROM_SCRATCH_SIZE

PROM_SCRATCH_SIZE is same as sizeof(prom_scratch)

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2019-04-02 09:08:38 +00:00 • committed by Michael Ellerman
commit d7fbe2a043