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.m54455evb b/doc/README.m54455evb
index 1888e16..257bcd5 100644
--- a/doc/README.m54455evb
+++ b/doc/README.m54455evb
@@ -52,12 +52,12 @@
 
 - include/configs/M54455EVB.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/time.c			Timer functions (Dma timer and PIT)
-- 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/time.c			Timer functions (Dma timer and PIT)
+- arch/m68k/lib/traps.c			Exception init code
 
 - rtc/mcfrtc.c				Realtime clock Driver