util: resource: Add resource flag to express the specific features

util: resource: Add resource flag to express the specific features

Each resource are able to have the non-common features.
The resource flag will be used to indicate the characteristics
of resource.

- RESOURCE_FLAG_COUNT_ONLY_ONE
  : Some resource's resource count is only one on all board such as system and
  memory resources. Add this flag when want to return 1 as resource count.
- RESOURCE_FLAG_PROCESS
  : process and process-group are not physical resource like CPU/GPU/Memory.
  Sometimes, it should be handled by the different handling. In order to
  separate out them, use this flag.

Change-Id: Ic7df2cae2105b14382c0f084c30fbbcde5efdac4
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>