Move AHCI driver into separate drivers/ directory

src/drivers/ahci/driver.cpp

@@ -0,0 +1,22 @@
+#include "kutil/enum_bitfields.h"
+#include "ahci/driver.h"
+#include "log.h"
+#include "pci.h"
+
+namespace ahci {
+
+
+driver::driver()
+{
+}
+
+void
+driver::register_device(pci_device *device)
+{
+	log::info(logs::driver, "AHCI registering device %d:%d:%d:",
+			device->bus(), device->device(), device->function());
+
+	ahci::hba &hba = m_devices.emplace(device);
+}
+
+} // namespace