Add a new function to count the number of instance of the same IP block
in the current ip_block list, then use the returned count value to set
the newly defined instance variable in ip_block, to track the instance
number of each ip_block.

Signed-off-by: Boyuan Zhang <boyuan.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Suggested-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>