lxd/resources: Fix total memory for per NUMA node
lxd/resources: Fix total memory for per NUMA node

This change applies the same change as 375ce45456e9f0789a48541704014a1695896a0f
To the per NUMA node total memory calculation.

Signed-off-by: Nicolas Bock <4ad6fd604400c7892c7a2cb53bf674987bcaa405@canonical.com>

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