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>

config/pineapplesynxconf.h

@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#define TARGET_SYNX_ENABLE 1