CI: run clippy for all packages and deny warnings

Now that all clippy warnings have been fixed, simply run clippy for all
packages in the workspace.

While we are at it, emit an error on clippy warnings, which were
previously being allowed.

Author: 00xc

.github/workflows/build.yml

@@ -67,6 +67,8 @@ jobs:
 
   clippy:
     runs-on: ubuntu-latest
+    env:
+      RUSTFLAGS: "-Dwarnings"
     steps:
     - uses: actions/checkout@v2
       with:
@@ -79,14 +81,8 @@ jobs:
         profile: minimal
         components: clippy
 
-    - name: Run clippy (ACPI)
-      run: cargo clippy -p acpi
-
-    - name: Run clippy (ACPI tests)
-      run: cargo clippy -p acpi --tests
-
-    - name: Run clippy (AML)
-      run: cargo clippy -p aml
+    - name: Run clippy
+      run: cargo clippy --all
 
-    - name: Run clippy (AML tests)
-      run: cargo clippy -p aml --tests
+    - name: Run clippy (tests)
+      run: cargo clippy --all --tests