Move lib_$ARCH directories to arch/$ARCH/lib

Also move lib_$ARCH/config.mk to arch/$ARCH/config.mk

This change is intended to clean up the top-level directory structure
and more closely mimic Linux's directory organization.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/config.mk b/config.mk
index 1a61dbb..85b524e 100644
--- a/config.mk
+++ b/config.mk
@@ -114,7 +114,7 @@
 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
 CPUDIR=cpu/$(CPU)
 
-sinclude $(TOPDIR)/lib_$(ARCH)/config.mk	# include architecture dependend rules
+sinclude $(TOPDIR)/arch/$(ARCH)/config.mk	# include architecture dependend rules
 sinclude $(TOPDIR)/$(CPUDIR)/config.mk		# include  CPU	specific rules
 
 ifdef	SOC