Run clippy against Arm build targets.

The current clippy runs are running against an X86 build of the code
This will make clippy exercise the Arm specfic code. I have only
enabled 2 as some jobs were cancelled when I enabled all 7 targets.

Author: wt

.github/workflows/clippy.yml

@@ -7,9 +7,41 @@ name: Clippy check
 jobs:
   clippy:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        # All generated code should be running on stable now
+        rust: [stable]
+        target: [
+            "thumbv8m.main-none-eabihf",
+            # "thumbv8m.main-none-eabi",
+            # "thumbv8m.base-none-eabi",
+            # "thumbv7em-none-eabihf",
+            "thumbv7em-none-eabi",
+            # "thumbv7m-none-eabi",
+            # "thumbv6m-none-eabi",
+          ]
+
+        # include:
+        #   # Test MSRV
+        #   - rust: 1.85.0
+
+        #   # Test nightly but don't fail
+        # - rust: nightly
+        #   experimental: true
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@1.85
+      - uses: dtolnay/rust-toolchain@master
         with:
+          toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.target }}
           components: clippy
-      - run: cargo clippy --all --features cortex-m/critical-section-single-core -- --deny warnings
+      - name: Run clippy
+        run: cargo clippy -p cortex-m -p cortex-m-rt --features cortex-m/critical-section-single-core --target ${{matrix.target}} -- --deny warnings
+        # run: cargo clippy --all --features cortex-m/critical-section-single-core -- --deny warnings
+
+    # steps:
+    #   - uses: actions/checkout@v4
+    #   - uses: dtolnay/rust-toolchain@1.85
+    #     with:
+    #       components: clippy
+    #   - run: cargo clippy --all --features cortex-m/critical-section-single-core -- --deny warnings