Move arch specific fiels to arch subdir

Take the chance to update some includes using files available in that
subdir to have them ina more uniform way.

Change-Id: Ibda3c54fd4dc3f6b845cc373f1a1e6b758c1ea82
diff --git a/Transceiver52M/arch/Makefile.am b/Transceiver52M/arch/Makefile.am
new file mode 100644
index 0000000..14e6c82
--- /dev/null
+++ b/Transceiver52M/arch/Makefile.am
@@ -0,0 +1,8 @@
+include $(top_srcdir)/Makefile.common
+
+SUBDIRS = common
+if ARCH_ARM
+SUBDIRS += arm
+else
+SUBDIRS += x86
+endif