Kernel: Implement byte ring buffer

This maps the ring twice right next to each other so we don't have to
care about wrapping around when doing memcpy or accessing the data

kernel/CMakeLists.txt

@@ -50,6 +50,7 @@ set(KERNEL_SOURCES
 	kernel/InterruptController.cpp
 	kernel/kernel.cpp
 	kernel/Lock/SpinLock.cpp
+	kernel/Memory/ByteRingBuffer.cpp
 	kernel/Memory/DMARegion.cpp
 	kernel/Memory/FileBackedRegion.cpp
 	kernel/Memory/Heap.cpp