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/keymile/common/keymile_hdlc_enet.c b/board/keymile/common/keymile_hdlc_enet.c
index ceddaf7..ce5e4d6 100644
--- a/board/keymile/common/keymile_hdlc_enet.c
+++ b/board/keymile/common/keymile_hdlc_enet.c
@@ -2,7 +2,7 @@
  * (C) Copyright 2008
  * Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de.
  *
- * Based in part on arch/ppc/cpu/mpc8260/ether_scc.c.
+ * Based in part on arch/powerpc/cpu/mpc8260/ether_scc.c.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
diff --git a/board/keymile/km8xx/km8xx_hdlc_enet.c b/board/keymile/km8xx/km8xx_hdlc_enet.c
index 543deaf..0478288 100644
--- a/board/keymile/km8xx/km8xx_hdlc_enet.c
+++ b/board/keymile/km8xx/km8xx_hdlc_enet.c
@@ -2,7 +2,7 @@
  * (C) Copyright 2008
  * Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de.
  *
- * Based in part on arch/ppc/cpu/mpc8xx/scc.c.
+ * Based in part on arch/powerpc/cpu/mpc8xx/scc.c.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
diff --git a/board/keymile/km8xx/u-boot.lds b/board/keymile/km8xx/u-boot.lds
index 19936bd..cba9c6c 100644
--- a/board/keymile/km8xx/u-boot.lds
+++ b/board/keymile/km8xx/u-boot.lds
@@ -55,15 +55,15 @@
     /* WARNING - the following is hand-optimized to fit within	*/
     /* the sector layout of our flash chips!	XXX FIXME XXX	*/
 
-    arch/ppc/cpu/mpc8xx/start.o		(.text)
-    arch/ppc/cpu/mpc8xx/traps.o		(.text)
+    arch/powerpc/cpu/mpc8xx/start.o		(.text)
+    arch/powerpc/cpu/mpc8xx/traps.o		(.text)
     common/dlmalloc.o		(.text)
-    arch/ppc/lib/ppcstring.o		(.text)
+    arch/powerpc/lib/ppcstring.o		(.text)
     lib/vsprintf.o	(.text)
     lib/crc32.o		(.text)
     lib/zlib.o		(.text)
-    arch/ppc/lib/cache.o		(.text)
-    arch/ppc/lib/time.o		(.text)
+    arch/powerpc/lib/cache.o		(.text)
+    arch/powerpc/lib/time.o		(.text)
 
     . = DEFINED(env_offset) ? env_offset : .;
     common/env_embedded.o	(.ppcenv)
diff --git a/board/keymile/mgcoge/mgcoge_hdlc_enet.c b/board/keymile/mgcoge/mgcoge_hdlc_enet.c
index 6b8e7ea..98f68a6 100644
--- a/board/keymile/mgcoge/mgcoge_hdlc_enet.c
+++ b/board/keymile/mgcoge/mgcoge_hdlc_enet.c
@@ -2,7 +2,7 @@
  * (C) Copyright 2008
  * Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de.
  *
- * Based in part on arch/ppc/cpu/mpc8260/ether_scc.c.
+ * Based in part on arch/powerpc/cpu/mpc8260/ether_scc.c.
  *
  * See file CREDITS for list of people who contributed to this
  * project.