[Keyboard] Add stront keyboard (#21035)

keyboards/stront/mcuconf.h

@@ -0,0 +1,12 @@
+// Copyright 2023 zzeneg (@zzeneg)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include_next <mcuconf.h>
+
+#undef RP_SPI_USE_SPI1
+#define RP_SPI_USE_SPI1 TRUE
+
+#undef RP_PWM_USE_PWM7
+#define RP_PWM_USE_PWM7 TRUE