This reverts commit 482b718a.

The preceding commits by Nicholas Piggin enable PS3 support for ELFv2,
so there's no need to disable it for PS3 anymore.
Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/983836405df1b6001a2262972fb32d1aee97d6f5.1705654669.git.geoff@infradead.org