Старые названия модулей (#116)

* Старые названия модулей

Старые названия у модулей riscv_core (processor_core) и riscv_unit (processor_system) в Labs/07. Datapath/board files/README.md

* Чистка старых названий модулей

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Co-authored-by: Andrei Solodovnikov <voultboy@yandex.ru>

.pic/Labs/board files/nexys_processor_system_structure.drawio.svg

@@ -64,13 +64,13 @@
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-                                nexys_riscv_unit
+                                nexys_processor_system
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-                    nexys_riscv_unit
+                    nexys_processor_system
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@@ -189,13 +189,13 @@
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-                                riscv_core
+                                processor_core
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+                    processor_core
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@@ -240,13 +240,13 @@
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-                                riscv_unit
+                                processor_system
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