src: Rename source folders for atsam and atsamd architectures

Signed-off-by: Florian Heilmann <Florian.Heilmann@gmx.net>

src/atsamd/internal.h

@@ -0,0 +1,14 @@
+#ifndef __SAMD21_INTERNAL_H
+#define __SAMD21_INTERNAL_H
+// Local definitions for samd21 code
+
+#include <stdint.h> // uint32_t
+
+#define GPIO(PORT, NUM) (((PORT)-'A') * 32 + (NUM))
+#define GPIO2PORT(PIN) ((PIN) / 32)
+#define GPIO2BIT(PIN) (1<<((PIN) % 32))
+
+void enable_pclock(uint32_t clock_id, uint32_t pmask);
+void gpio_peripheral(uint32_t gpio, char ptype, int32_t pull_up);
+
+#endif // internal.h