Merge branch 'fixes' into next

Merge our fixes branch. In particular this brings in commit
2f2e917c1ba1 ("powerpc/book3e: Fix PUD allocation size in
map_kernel_page()") which fixes a build failure in next, because commit
96bb43d3c142 ("powerpc/64e: Rewrite p4d_populate() as a static inline
function") depends on it.

diff --cc arch/powerpc/Kconfig
Simple merge

diff --cc arch/powerpc/kernel/prom_init.c
Simple merge

diff --cc arch/powerpc/mm/mem.c
Simple merge

diff --cc arch/powerpc/platforms/pseries/setup.c
Simple merge