BRAM support + MemoryAllocator rework

See merge request acs/public/villas/VILLASfpga-code!7

This is change renders memory allocators only dependend on an address
space id that they are managing, allowing easy implementation of other
algorithms and instantiation in memory IP blocks.

Added pkg-config file and CMake configuration for building RPM packages

See merge request acs/public/villas/VILLASfpga-code!6

# Conflicts:
#   CMakeLists.txt

DMA IP and memory management

See merge request acs/public/villas/VILLASfpga-code!5

This caused sign extension for addresses with the MSB set which is
obviously wrong since this is an address and not a number. With
Jansson, there seems to be now other way since it only supports
reading (signed) integers.

This commit is 2/2 of a series of patches and not working on its own.

This commit is 1/2 of a series of patches and not working on its own.

 * load IOMMU type 1 kernel module
 * determine IOMMU group dynamically
 * add user dkr to fpga group

Logging is used everywhere and there's no justification of the clutter
and runtime overhead of `aut logger = getLogger();` everywhere.

This is a one-liner, so IMO increases readability.

Also update JSON config with the new output.

This is the case when the application is not executed as root which is
now possible, with the drawback that we cannot set the IRQ affinity
anymore.

These are now set in the root CMakeLists.txt

Graph-based memory-manager for translating between addressspaces

See merge request acs/public/villas/VILLASfpga-code!4