crypto: ppc/curve25519 - Low-level primitives for ppc64le

JIRA: https://issues.redhat.com/browse/RHEL-52758

commit bbb66f2
Author: Danny Tsen <dtsen@linux.ibm.com>
Date:   Thu May 16 11:19:55 2024 -0400

    crypto: ppc/curve25519 - Low-level primitives for ppc64le

    Use the perl output of x25519-ppc64.pl from CRYPTOGAMs
    (see https://github.com/dot-asm/cryptogams/) and added four
    supporting functions, x25519_fe51_sqr_times, x25519_fe51_frombytes,
    x25519_fe51_tobytes and x25519_cswap.

    Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Mamatha Inamdar <minamdar@redhat.com>

Author: Mamatha Inamdar