refactor(guid-partition): list.entry_count to unsigned int

Change list.entry_count to unsigned int to align with header.list_num,
removing the need for casting.

Change-Id: Id4259d9e841c8d34fe23fb74a7c627f2a643cbf2
Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
2 files changed