common: avb_verify: Fix memory leaks

Cppcheck (v1.85) reports w/o this patch:

[common/avb_verify.c:351]: (error) Memory leak: part
[common/avb_verify.c:356]: (error) Memory leak: part
[common/avb_verify.c:361]: (error) Memory leak: part
[common/avb_verify.c:366]: (error) Memory leak: part

Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@linaro.org>
1 file changed