CMM_{STORE,LOAD}_SHARED() accept expressions. However,
uatomic_{load,store} accept address. To pass from the latter to the
former, a dereference is necessary.
Furthermore, the C11 compatibility layer for x86.h on store operations
was wrongly named after the `set' operation.
Change-Id: Icb1468de3de4878b5744e632314aa8332ad7fe26 Signed-off-by: Olivier Dion <odion@efficios.com> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>