Updated the qdma_nl.h

Updated the license header for QDMA Linux Driver application include files

Resolved HW errors observed with QDMA4.0 MM only design

Fix wrong user irq max

xdma_thread: fix cpu node bug

XDMA: increase nxt_adj to 0x3F (max. allowed) and fixed nxt_adj setting when last descriptor does not fall on the page boundary

2020.1 QDMA Linux Driver Release Updated

2020.1 DPDK Release notes updated

2020.1 QDMA Linux, DPDK and Windows Drivers are common drivers which supports the QDMA4.0 and QDMA3.1 Designs

User irq max was incorrectly set to h2c_channel_max

The number of threads is arbitrarily set to 8 and we iterate over 8 cpus
without knowing if we really have 8 cpus. This causes a call to
cpu_to_node with an index that is out of bound, thus returning an
undefined number, which crashes later when calling
kthread_create_on_node.
Fix this by iterating over the online cpus stopping when reaching the
number of threads that is specified.

Updated 2019.2 documentation path

Fixes a design error revealed by running on aarch64

Fix building for Linux 5.0 and newer

Fix a Linux crash when pci_msix_vec_count() returns -EINVAL

Simply put, you cannot call wait_event_interruptible_timeout while
holding a spin_lock. The reason the driver got away with this on
x86 is because the hardware is somehow fast enough so that the
condition is never false and hence no scheduling ever needs to
occur.

Updated the comments for #defines in libqdma_export.h for 2019.2 release

Also described in https://github.com/Xilinx/dma_ip_drivers/issues/45

Removed the stale qdma_reg_dump.h file reference from Makefile.

QDMA Linux reference driver for 2019.2 release

Co-Authored-By: sujathabanoth-xlnx <sujathabanoth-xlnx@users.noreply.github.com>