linux-generic: atomic: non-relaxed 64bit operations
linux-generic: atomic: non-relaxed 64bit operations

Implemented 64 bit non-relaxed atomic operations. Additional
ordering is not needed in case of using ATOMIC_OP since it
includes both acquire and release ordering.

Signed-off-by: Petri Savolainen <d528fd253b9aaf78fa72edbcc6249e82047f6ce6@nokia.com>
Reviewed-by: Ola Liljedahl <6d19e6e0076f8797cfccb58ffb99074265221b72@linaro.org>
Signed-off-by: Maxim Uvarov <db4d16e02ae2d7493db430203537da8b2e34f290@linaro.org>

erachmi/odp,dkrot/odp,ravineet-singh/odp,dkrot/odp,dkrot/odp,ravineet-singh/odp,mike-holmes-linaro/odp,ravineet-singh/odp,mike-holmes-linaro/odp,nmorey/odp,nmorey/odp,erachmi/odp,nmorey/odp,erachmi/odp,mike-holmes-linaro/odp,nmorey/odp,mike-holmes-linaro/odp,ravineet-singh/odp,dkrot/odp,erachmi/odp