[Core] Use polled waiting on ChibiOS platforms that support it (#17607)

* Use polled waiting on platforms that support it

Due to context switching overhead waiting a very short amount of time on
a sleeping thread is often not accurate and in fact not usable for timing
critical usage i.e. in a driver. Thus we use polled waiting for ranges
in the us range on platforms that support it instead. The fallback is
the thread sleeping mechanism.

This includes:

* ARM platforms with CYCCNT register (ARMv7, ARMv8) this is
  incremented at CPU clock frequency
* GD32VF103 RISC-V port with CSR_MCYCLE register this is incremented at
  CPU clock frequency
* RP2040 ARMv6 port which uses the integrated timer peripheral which is
  incremented with a fixed 1MHz frequency

* Use wait_us() instead of chSysPolledDelayX

...as it is powered by busy waiting now.

* Add chibios waiting methods test bench

1 files changed, 12 insertions, 0 deletions

diff --git a/keyboards/handwired/onekey/keymaps/chibios_waiting_test/config.h b/keyboards/handwired/onekey/keymaps/chibios_waiting_test/config.h
new file mode 100644
index 0000000000..0c75fa3044
--- /dev/null
+++ b/keyboards/handwired/onekey/keymaps/chibios_waiting_test/config.h
@@ -0,0 +1,12 @@
+// Copyright 2022 Stefan Kerkmann
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#if !defined(QMK_WAITING_TEST_BUSY_PIN)
+#    define QMK_WAITING_TEST_BUSY_PIN A8
+#endif
+
+#if !defined(QMK_WAITING_TEST_YIELD_PIN)
+#    define QMK_WAITING_TEST_YIELD_PIN A9
+#endif