smbios: Fix duplicated smbios handles

smbios: Fix duplicated smbios handles

Some smbios types can have multiple instances (e.g. Type 7, 9, 16, 17,
19), thus the 'handle' argument should be a pointer so that the value
can be accumulated when writing all the instances.
This also fix the observed duplicated Type 7 handles.

Fixes: bcf456dd369e ("smbios: add detailed smbios information")
Signed-off-by: Raymond Mao <raymondmaoca@gmail.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Tested-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>