Guard a couple of AVR-specific places with an ifdef

We have a few AVR-specific things which do not have a guard yet, and cause
issues on other architectures. This adds those missing guards to the following
places:

- The `kaleidoscope::Hardware` base class, which is deprecated, but still
exists. As such, it needs to be restricted to AVR devices only (since that's all
it supported, non-AVR devices should use the new APIs).
- `device/keyboardio/twi` are only used by the Imago at the moment, and is
AVR-specific, so guard that too.
- Removed an unneeded include from `driver::bootloader::None`, because it
doesn't need `<avr/wdt.h>`.
- `plugin::FirmwareDump` is now restricted to AVR, because that's the only
architecture we support dumping the firmware on.

Signed-off-by: Gergely Nagy <algernon@keyboard.io>

src/kaleidoscope/Hardware.h

@@ -21,6 +21,8 @@
 
 #pragma once
 
+#ifdef __AVR__
+
 #include "kaleidoscope/MatrixAddr.h"
 #include "kaleidoscope_internal/deprecations.h"
 
@@ -402,3 +404,5 @@ class Hardware {
   /** @} */
 };
 }
+
+#endif

src/kaleidoscope/device/keyboardio/twi.c

@@ -18,6 +18,8 @@
   Modified 2012 by Todd Krein (todd@krein.org) to implement repeated starts
 */
 
+#ifdef __AVR__
+
 #define ENABLE_TWI_SLAVE_MODE 0
 
 #include <math.h>
@@ -559,3 +561,5 @@ ISR(TWI_vect) {
     break;
   }
 }
+
+#endif

src/kaleidoscope/device/keyboardio/twi.h

@@ -16,6 +16,8 @@
   with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
+#ifdef __AVR__
+
 #ifndef twi_h
 #define twi_h
 
@@ -51,3 +53,4 @@ void twi_stop(void);
 void twi_releaseBus(void);
 
 #endif
+#endif

src/kaleidoscope/driver/bootloader/None.h

@@ -17,7 +17,6 @@
 
 #pragma once
 
-#include <avr/wdt.h>
 #include "kaleidoscope/driver/bootloader/Base.h"
 
 namespace kaleidoscope {

src/kaleidoscope/driver/storage/AVREEPROM.h

@@ -17,7 +17,7 @@
 
 #pragma once
 
-#ifdef ARDUINO_ARCH_AVR
+#ifdef __AVR__
 
 #include "kaleidoscope/driver/storage/Base.h"
 #include <EEPROM.h>

src/kaleidoscope/plugin/FirmwareDump.cpp

@@ -15,6 +15,7 @@
  * this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#ifdef __AVR__
 #ifndef KALEIDOSCOPE_VIRTUAL_BUILD
 
 #include <Kaleidoscope-FirmwareDump.h>
@@ -72,3 +73,4 @@ EventHandlerResult FirmwareDump::onFocusEvent(const char *command) {
 kaleidoscope::plugin::FirmwareDump FirmwareDump;
 
 #endif
+#endif

src/kaleidoscope/plugin/FirmwareDump.h

@@ -21,6 +21,8 @@
 #error "Firmware Dump is not available for virtual builds"
 #else
 
+#ifdef __AVR__
+
 #include <Kaleidoscope.h>
 
 namespace kaleidoscope {
@@ -42,3 +44,4 @@ class FirmwareDump : public kaleidoscope::Plugin {
 extern kaleidoscope::plugin::FirmwareDump FirmwareDump;
 
 #endif
+#endif