resource-manager: Add get API for INSTANCE_TYPE_NORMAL

resource-manager: Add get API for INSTANCE_TYPE_NORMAL

Resource instance type of INSTANCE_TYPE_NORMAL fetches its attribute
value by calling attribute_ops.get().
 - syscommon_resman_get_resource_attr_int()
 - syscommon_resman_get_resource_attr_int64()
 - syscommon_resman_get_resource_attr_uint()
 - syscommon_resman_get_resource_attr_uint64()
 - syscommon_resman_get_resource_attr_double()
 - syscommon_resman_get_resource_attr_string()
 - syscommon_resman_get_resource_attr_array()
 - syscommon_resman_get_resource_attr_ptr()

Change-Id: Ib3482ff685b0c3e4783cd8a3ce7dc5e6ab1e9699
Signed-off-by: Youngjae Cho <y0.cho@samsung.com>