The error exit path omits kfree'ing the allocated new_smi, causing a memory
leak. Fix this by kfree'ing new_smi.
Detected by CoverityScan, CID#14582571 ("Resource Leak")
Fixes: 7e030d6dff71 ("ipmi: Prefer ACPI system interfaces over SMBIOS ones") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Corey Minyard <cminyard@mvista.com>