contrib/firmware: add new adapter ANGIE's firmware/bitstream code

This is ANGIE's firmware and bitstream code.
The 'Embeded C' code is based on the openULINK project.
The hdl bitstream source code is for the spartan-6 FPGA included in
ANGIE.

Since ANGIE has a different microcontroller (EZ-USB FX2) than openULINK
(EZ-USB AN2131), the registers file (reg_ezusb.h) has been changed
completely, so are the descriptors, interruptions and the endpoints
configuration.

Change-Id: I70590c7c58bac6f1939c5ffba57e87d86850664d
Signed-off-by: Ahmed BOUDJELIDA <aboudjelida@nanoxplore.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7701
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

doc/usb_adapters/angie/584e_424e_angie.txt

@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: GPL-2.0-or-later OR GFDL-1.2-no-invariants-or-later
+
+Bus 001 Device 056: ID 584e:424e NanoXplore, SAS. ANGIE Adapter
+Device Descriptor:
+  bLength                18
+  bDescriptorType         1
+  bcdUSB               2.00
+  bDeviceClass          255 Vendor Specific Class
+  bDeviceSubClass       255 Vendor Specific Subclass
+  bDeviceProtocol       255 Vendor Specific Protocol
+  bMaxPacketSize0        64
+  idVendor           0x584e
+  idProduct          0x424e
+  bcdDevice            0.00
+  iManufacturer           1 NanoXplore, SAS.
+  iProduct                2 ANGIE Adapter
+  iSerial                 3 000001
+  bNumConfigurations      1
+  Configuration Descriptor:
+    bLength                 9
+    bDescriptorType         2
+    wTotalLength       0x0027
+    bNumInterfaces          1
+    bConfigurationValue     1
+    iConfiguration          4 (error)
+    bmAttributes         0x80
+      (Bus Powered)
+    MaxPower              100mA
+    Interface Descriptor:
+      bLength                 9
+      bDescriptorType         4
+      bInterfaceNumber        0
+      bAlternateSetting       0
+      bNumEndpoints           3
+      bInterfaceClass       255 Vendor Specific Class
+      bInterfaceSubClass    255 Vendor Specific Subclass
+      bInterfaceProtocol    255 Vendor Specific Protocol
+      iInterface              0
+      Endpoint Descriptor:
+        bLength                 7
+        bDescriptorType         5
+        bEndpointAddress     0x01  EP 1 OUT
+        bmAttributes            2
+          Transfer Type            Bulk
+          Synch Type               None
+          Usage Type               Data
+        wMaxPacketSize     0x0040  1x 64 bytes
+        bInterval               0
+      Endpoint Descriptor:
+        bLength                 7
+        bDescriptorType         5
+        bEndpointAddress     0x81  EP 1 IN
+        bmAttributes            2
+          Transfer Type            Bulk
+          Synch Type               None
+          Usage Type               Data
+        wMaxPacketSize     0x0040  1x 64 bytes
+        bInterval               0
+      Endpoint Descriptor:
+        bLength                 7
+        bDescriptorType         5
+        bEndpointAddress     0x02  EP 2 OUT
+        bmAttributes            2
+          Transfer Type            Bulk
+          Synch Type               None
+          Usage Type               Data
+        wMaxPacketSize     0x0200  1x 512 bytes
+        bInterval               0