powerpc/powernv: Use FIXUP_ENDIAN_HV in OPAL return

Close the recoverability gap for OPAL calls by using FIXUP_ENDIAN_HV
in the return path.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
1 file changed