[CONFIG] MTD subsystem added to os/Kconfig
[MM] slab: size of allocated memotry is now always rounded up to be a multiple of 4
[OS] threads: when a thread is finished it is now also deleted from the list
[OS] net: handling of pointers of queues in sys_arch corrected
[ARCH] ARM - v7-mmu - bt_mmu_get_ttb was setting the TTBR0 instead of reading, leading to pre-fetch aborts.

Also added a DSB and DSB/ISN before and after setting ASID and fluishing tlb.
[KERNEL] FreeRTOS - Cleanup kernel stack on task termination.
[KERNEL] FreeRTOS - Added support for NEWLIB reentrancy via _impure_ptr.
[LINKER] Added some extra sections to the linker script.
[MM] SLAB - Ensure that page allocation succeed (don't do phys_to_virt(NULL)).
[NET] lwIP - Sys integration uses kernel level semaphores/mutex's for lower overhead.