[Core] `usb_device_state`: consolidate usb state handling across implementations (#24258)

* usb_device_state: add idle_rate, led and protocol

Previously all usb drivers and platform implementations (expect for our
oddball atsam) tracked the same two global variables:

- keyboard_protocol: to indicate if we are in report or boot protocol
- keyboard_idle: for the idle_rate of the keyboard endpoint

And a local variable that was exposed trough some indirection:

- keyboard_led_state: for the currently set indicator leds (caps lock etc.)

These have all been moved into the usb_device_state struct wich is
accessible by getters and setters.

This reduces code duplication and centralizes the state management
across platforms and drivers.

Signed-off-by: Stefan Kerkmann <karlk90@pm.me>

* usb_device_state: reset protocol on reset

The usb hid specification section 7.2.6 states:

When initialized, all devices default to report protocol. However the
host should not make any assumptions about the device’s state and should
set the desired protocol whenever initializing a device.

Thus on reset we should always do exactly that.

Signed-off-by: Stefan Kerkmann <karlk90@pm.me>

* keyboards: fix oversize warnings

Signed-off-by: Stefan Kerkmann <karlk90@pm.me>

---------

Signed-off-by: Stefan Kerkmann <karlk90@pm.me>

1 files changed, 2 insertions, 1 deletions

diff --git a/quantum/action_util.c b/quantum/action_util.c
index 52171b5050..c0dc4f3822 100644
--- a/quantum/action_util.c
+++ b/quantum/action_util.c
@@ -21,6 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "action_layer.h"
 #include "timer.h"
 #include "keycode_config.h"
+#include "usb_device_state.h"
 #include <string.h>
 
 extern keymap_config_t keymap_config;
@@ -318,7 +319,7 @@ void send_nkro_report(void) {
  */
 void send_keyboard_report(void) {
 #ifdef NKRO_ENABLE
-    if (keyboard_protocol && keymap_config.nkro) {
+    if (usb_device_state_get_protocol() == USB_PROTOCOL_REPORT && keymap_config.nkro) {
         send_nkro_report();
     } else {
         send_6kro_report();