Full restructure in accordance with

- pkg/{subsystem}/{package} style
  - modify Makefile to reflect the new style,
    consolidate various entries
  - add a dummy ``main.go`` at top level

pkg/os/scsi/constants_linux.go

@@ -0,0 +1,63 @@
+/*
+ * Mini Object Storage, (C) 2014 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// !build linux,amd64
+
+package scsi
+
+var (
+	// From 2.6.x kernel onwards, no need to support procfs
+	SYSFS_SCSI_DEVICES       = "/sys/bus/scsi/devices/"
+	SYSFS_BLOCK              = "/sys/block/"
+	SYSFS_CLASS_SCSI_DEVICES = "/sys/class/scsi_device/"
+	UDEV                     = "/dev/"
+	DEV_DISK_BYID_DIR        = "/dev/disk/by-id"
+)
+
+var SCSI_DEVICE_TYPES = []string{
+	"disk",
+	"tape",
+	"printer",
+	"process",
+	"worm",
+	"cd/dvd",
+	"scanner",
+	"optical",
+	"mediumx",
+	"comms",
+	"(0xa)",
+	"(0xb)",
+	"storage",
+	"enclosu",
+	"sim disk",
+	"optical rd",
+	"bridge",
+	"osd",
+	"adi",
+	"sec man",
+	"zbc",
+	"(0x15)",
+	"(0x16)",
+	"(0x17)",
+	"(0x18)",
+	"(0x19)",
+	"(0x1a)",
+	"(0x1b)",
+	"(0x1c)",
+	"(0x1e)",
+	"wlun",
+	"no dev",
+}