amd/addrlib: Initialize Lib members in constructors.

amd/addrlib: Initialize Lib members in constructors.

Fix defects reported by Coverity Scan.

uninit_member: Non-static class member m_maxBaseAlign is not initialized in this constructor nor in any functions that it calls.
uninit_member: Non-static class member m_maxMetaBaseAlign is not initialized in this constructor nor in any functions that it calls.

Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7768>