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/doc/README.m5475evb b/doc/README.m5475evb
index f3a1d7b..b61dfba 100644
--- a/doc/README.m5475evb
+++ b/doc/README.m5475evb
@@ -58,11 +58,11 @@
 
 - include/configs/M5475EVB.h		Board specific configuration file
 
-- lib_m68k/board.c			board init function
-- lib_m68k/cache.c
-- lib_m68k/interrupts			Coldfire common interrupt functions
-- lib_m68k/m68k_linux.c
-- lib_m68k/traps.c			Exception init code
+- arch/m68k/lib/board.c			board init function
+- arch/m68k/lib/cache.c
+- arch/m68k/lib/interrupts			Coldfire common interrupt functions
+- arch/m68k/lib/m68k_linux.c
+- arch/m68k/lib/traps.c			Exception init code
 
 1 MCF547x specific Options/Settings
 ====================================