Adjusted bigmem version (combined kravind/semaphore implementation)

Change-Id: Id735be5d8d967001b345bddee5a6aba6370fd0db

Signed-off-by: Volk204 <volk204@mail.ru>
Reduce number of buffers to save available RAM

thanks to DerTeufel

Signed-off-by: Volk204 <volk204@mail.ru>