If we couldn't fully init a context, we were leaking memory.

Fixes: b9721d27 ("ocxl: Allow external drivers to use OpenCAPI contexts")
Signed-off-by: NFrederic Barrat <fbarrat@linux.ibm.com>
Acked-by: NAndrew Donnellan <ajd@linux.ibm.com>
Reviewed-by: NGreg Kurz <groug@kaod.org>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191209105513.8566-1-fbarrat@linux.ibm.com