Add L432, L442. (#16016)

keyboards/handwired/onekey/nucleo_l432kc/config.h

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+// Copyright 2021 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#include "config_common.h"
+
+#define PRODUCT Onekey L432KC
+
+#define MATRIX_COL_PINS { A2 }
+#define MATRIX_ROW_PINS { A1 }
+#define UNUSED_PINS
+
+#define BACKLIGHT_PIN         B8
+#define BACKLIGHT_PWM_DRIVER  PWMD4
+#define BACKLIGHT_PWM_CHANNEL 3
+#define BACKLIGHT_PAL_MODE    2
+
+#define RGB_DI_PIN A0
+#define RGB_CI_PIN B13
+
+#define ADC_PIN A0

keyboards/handwired/onekey/nucleo_l432kc/readme.md

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+# STM32 Nucleo-L432 onekey
+
+To trigger keypress, short together pins *A1* and *A2*.
+
+You'll also need to connect `VIN`, `GND`, USB `D+` to `PA12`/`D2`, and USB `D-` to `PA11`/`D10`.

keyboards/handwired/onekey/nucleo_l432kc/rules.mk

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+# MCU name
+MCU = STM32L432
+
+# Bootloader selection
+BOOTLOADER = stm32-dfu