powerpc: get rid of PMD_PAGE_SIZE() and _PMD_SIZE

[Michael Ellerman]

On Wed, 2018-05-16 at 06:58:57 UTC, Christophe Leroy wrote:
> PMD_PAGE_SIZE() is nowhere used and _PMD_SIZE is only
> used by PMD_PAGE_SIZE().
> 
> This patch removes them.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/5279821a6f5ff75d7dce632e49b9fb

cheers