Move arch/ppc to arch/powerpc

As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.

Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>
diff --git a/board/netstal/hcu5/README.txt b/board/netstal/hcu5/README.txt
index 0be5192..c5737d0 100644
--- a/board/netstal/hcu5/README.txt
+++ b/board/netstal/hcu5/README.txt
@@ -83,11 +83,11 @@
 Startup sequence
 ----------------
 
-(arch/ppc/cpu/ppc4xx/resetvec.S)
+(arch/powerpc/cpu/ppc4xx/resetvec.S)
 depending on configs option
 call _start_440 _start_pci oder _start
 
-(arch/ppc/cpu/ppc4xx/start.S)
+(arch/powerpc/cpu/ppc4xx/start.S)
 
 _start_440:
 	initialize register like
@@ -109,7 +109,7 @@
 	call cpu_init_f	/* run low-level CPU init code	   (from Flash) */
 
     call cpu_init_f
-    board_init_f: (arch/ppc/lib\board.c)
+    board_init_f: (arch/powerpc/lib\board.c)
 	init_sequence defines a list of function to be called
 	    board_early_init_f: (board/netstal/hcu5/hcu5.c)
 		We are using Bootstrap-Option A
@@ -136,18 +136,18 @@
 	 *  - board info struct
 	Save local variables to board info struct
 	call relocate_code() does not return
-	relocate_code: (arch/ppc/cpu/ppc4xx/start.S)
+	relocate_code: (arch/powerpc/cpu/ppc4xx/start.S)
 -------------------------------------------------------
 From now on our copy is in RAM and we will run from there,
 	starting with board_init_r
 -------------------------------------------------------
-    board_init_r: (arch/ppc/lib\board.c)
+    board_init_r: (arch/powerpc/lib\board.c)
 	setup bd function pointers
 	trap_init
 	flash_init: (board/netstal/hcu5/flash.c)
 		/* setup for u-boot erase, update */
 	setup bd flash info
-	cpu_init_r: (arch/ppc/cpu/ppc4xx/cpu_init.c)
+	cpu_init_r: (arch/powerpc/cpu/ppc4xx/cpu_init.c)
 	    peripheral chip select in using defines like
 	    CONFIG_SYS_EBC_PB0A, CONFIG_SYS_EBC_PB0C from hcu5.h
 	mem_malloc_init
@@ -161,8 +161,8 @@
 Most of the HW specific code for the HCU5 may be found in
 include/configs/hcu5.h
 board/netstal/hcu5/*
-arch/ppc/cpu/ppc4xx/*
-arch/ppc/lib/*
+arch/powerpc/cpu/ppc4xx/*
+arch/powerpc/lib/*
 include/ppc440.h
 
 Drivers for serial etc are found under drivers/