msm: synx: build script as DLKM for Vendor SI

added mk and Kbuild script to support building synx driver as external module for Vendor SI

Change-Id: Ib66325d115ca46e6b61de1e168e85d09419f73e2
Signed-off-by: NITIN LAXMIDAS NAIK <quic_nitinlax@quicinc.com>

msm/synx/synx_err.h

@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef __SYNX_ERR_H__
+#define __SYNX_ERR_H__
+
+#include <linux/err.h>
+
+/**
+ * Error codes returned from framework
+ *
+ * Return codes are mapped to platform specific
+ * return values.
+ */
+#define SYNX_SUCCESS   0
+#define SYNX_NOMEM     ENOMEM
+#define SYNX_NOSUPPORT EOPNOTSUPP
+#define SYNX_NOPERM    EPERM
+#define SYNX_TIMEOUT   ETIMEDOUT
+#define SYNX_ALREADY   EALREADY
+#define SYNX_NOENT     ENOENT
+#define SYNX_INVALID   EINVAL
+#define SYNX_BUSY      EBUSY
+
+#endif /* __SYNX_ERR_H__ */