When I submitted commit 6805ab6d
("powerpc: drop unused Kconfig symbols") I apparently failed to notice
that my patch also made PREP_RESIDUAL and PPC_A2_DD2 unused. Drop these
now.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>