netX90/4000: Number of acyclic request buffers of type "small" is too low

Currently, four small buffers are maintained to assemble smaller acylcic service requests and responses from. It tunred out that his number is too small, since in certain scenarios, more than four indications need to be send in a sequence, before they actually can be processed and the buffers are returned. Increase the amount of small buffers to a meaningful value.