[CPU] Cleanup x64 backend usage conditionals

src/xenia/gpu/d3d12/premake5.lua

@@ -30,7 +30,6 @@ project("xenia-gpu-d3d12-trace-viewer")
     "xenia-base",
     "xenia-core",
     "xenia-cpu",
-    "xenia-cpu-backend-x64",
     "xenia-gpu",
     "xenia-gpu-d3d12",
     "xenia-hid",
@@ -66,6 +65,11 @@ project("xenia-gpu-d3d12-trace-viewer")
     })
   end
 
+  filter("architecture:x86_64")
+    links({
+      "xenia-cpu-backend-x64",
+    })
+
 group("src")
 project("xenia-gpu-d3d12-trace-dump")
   uuid("686b859c-0046-44c4-a02c-41fc3fb75698")
@@ -77,7 +81,6 @@ project("xenia-gpu-d3d12-trace-dump")
     "xenia-base",
     "xenia-core",
     "xenia-cpu",
-    "xenia-cpu-backend-x64",
     "xenia-gpu",
     "xenia-gpu-d3d12",
     "xenia-hid",
@@ -112,3 +115,8 @@ project("xenia-gpu-d3d12-trace-dump")
       "1>scratch/stdout-trace-dump.txt",
     })
   end
+
+  filter("architecture:x86_64")
+    links({
+      "xenia-cpu-backend-x64",
+    })

src/xenia/gpu/vulkan/premake5.lua

@@ -34,7 +34,6 @@ project("xenia-gpu-vulkan-trace-viewer")
     "xenia-base",
     "xenia-core",
     "xenia-cpu",
-    "xenia-cpu-backend-x64",
     "xenia-gpu",
     "xenia-gpu-vulkan",
     "xenia-hid",
@@ -64,6 +63,11 @@ project("xenia-gpu-vulkan-trace-viewer")
     "../../ui/windowed_app_main_"..platform_suffix..".cc",
   })
 
+  filter("architecture:x86_64")
+    links({
+      "xenia-cpu-backend-x64",
+    })
+
   filter("platforms:Linux")
     links({
       "X11",
@@ -93,7 +97,6 @@ project("xenia-gpu-vulkan-trace-dump")
     "xenia-base",
     "xenia-core",
     "xenia-cpu",
-    "xenia-cpu-backend-x64",
     "xenia-gpu",
     "xenia-gpu-vulkan",
     "xenia-hid",
@@ -123,6 +126,11 @@ project("xenia-gpu-vulkan-trace-dump")
     "../../base/console_app_main_"..platform_suffix..".cc",
   })
 
+  filter("architecture:x86_64")
+    links({
+      "xenia-cpu-backend-x64",
+    })
+
   filter("platforms:Linux")
     links({
       "X11",