firmware: Remove the c attempt of the firmware

firmware/avr-specs/avr-atmega328p.json

@@ -0,0 +1,29 @@
+{
+  "arch": "avr",
+  "atomic-cas": false,
+  "cpu": "atmega328p",
+  "data-layout": "e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8",
+  "eh-frame-header": false,
+  "exe-suffix": ".elf",
+  "executables": true,
+  "late-link-args": {
+    "gcc": [
+        "-lgcc"
+    ]
+  },
+  "linker": "avr-gcc",
+  "linker-is-gnu": true,
+  "llvm-target": "avr-unknown-unknown",
+  "max-atomic-width": 8,
+  "no-default-libraries": false,
+  "pre-link-args": {
+    "gcc": [
+        "-mmcu=atmega328p",
+        "-Os",
+        "-mrelax",
+        "-flto"
+    ]
+  },
+  "target-c-int-width": "16",
+  "target-pointer-width": "16"
+}