partner/aller, nereid, tagus: Use updated csr APIs

litex commit 8be5824e258b84df240d34636aaa539124b92c65 simplified the handling
of csr regions and constants.

litex_boards/partner/targets/aller.py

@@ -179,8 +179,8 @@ class AllerSoC(SoCSDRAM):
         ]
 
     def generate_software_header(self, filename):
-        csr_header = get_csr_header(self.get_csr_regions(),
-                                    self.get_constants(),
+        csr_header = get_csr_header(self.csr_regions,
+                                    self.constants,
                                     with_access_functions=False,
                                     with_shadow_base=False)
         tools.write_to_file(filename, csr_header)

litex_boards/partner/targets/nereid.py

@@ -176,8 +176,8 @@ class NereidSoC(SoCSDRAM):
         ]
 
     def generate_software_header(self, filename):
-        csr_header = get_csr_header(self.get_csr_regions(),
-                                    self.get_constants(),
+        csr_header = get_csr_header(self.csr_regions,
+                                    self.constants,
                                     with_access_functions=False,
                                     with_shadow_base=False)
         tools.write_to_file(filename, csr_header)

litex_boards/partner/targets/tagus.py

@@ -177,8 +177,8 @@ class TagusSoC(SoCSDRAM):
         ]
 
     def generate_software_header(self, filename):
-        csr_header = get_csr_header(self.get_csr_regions(),
-                                    self.get_constants(),
+        csr_header = get_csr_header(self.csr_regions,
+                                    self.constants,
                                     with_access_functions=False,
                                     with_shadow_base=False)
         tools.write_to_file(filename, csr_header)