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/amcc/acadia/u-boot-nand.lds b/board/amcc/acadia/u-boot-nand.lds
index bfca582..e256b19 100644
--- a/board/amcc/acadia/u-boot-nand.lds
+++ b/board/amcc/acadia/u-boot-nand.lds
@@ -53,7 +53,7 @@
     /* WARNING - the following is hand-optimized to fit within	*/
     /* the sector layout of our flash chips!	XXX FIXME XXX	*/
 
-    arch/ppc/cpu/ppc4xx/start.o	(.text)
+    arch/powerpc/cpu/ppc4xx/start.o	(.text)
 
     /* Align to next NAND block */
     . = ALIGN(0x4000);
diff --git a/board/amcc/bamboo/u-boot-nand.lds b/board/amcc/bamboo/u-boot-nand.lds
index bfca582..e256b19 100644
--- a/board/amcc/bamboo/u-boot-nand.lds
+++ b/board/amcc/bamboo/u-boot-nand.lds
@@ -53,7 +53,7 @@
     /* WARNING - the following is hand-optimized to fit within	*/
     /* the sector layout of our flash chips!	XXX FIXME XXX	*/
 
-    arch/ppc/cpu/ppc4xx/start.o	(.text)
+    arch/powerpc/cpu/ppc4xx/start.o	(.text)
 
     /* Align to next NAND block */
     . = ALIGN(0x4000);
diff --git a/board/amcc/canyonlands/canyonlands.c b/board/amcc/canyonlands/canyonlands.c
index 71a5701..23874d2 100644
--- a/board/amcc/canyonlands/canyonlands.c
+++ b/board/amcc/canyonlands/canyonlands.c
@@ -42,7 +42,7 @@
 #define BOARD_ARCHES		4
 
 /*
- * Override the default functions in arch/ppc/cpu/ppc4xx/44x_spd_ddr2.c with
+ * Override the default functions in arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c with
  * board specific values.
  */
 #if defined(CONFIG_ARCHES)
diff --git a/board/amcc/canyonlands/u-boot-nand.lds b/board/amcc/canyonlands/u-boot-nand.lds
index b04b05e..c71f0b7 100644
--- a/board/amcc/canyonlands/u-boot-nand.lds
+++ b/board/amcc/canyonlands/u-boot-nand.lds
@@ -53,7 +53,7 @@
     /* WARNING - the following is hand-optimized to fit within	*/
     /* the sector layout of our flash chips!	XXX FIXME XXX	*/
 
-    arch/ppc/cpu/ppc4xx/start.o	(.text)
+    arch/powerpc/cpu/ppc4xx/start.o	(.text)
 
     /* Align to next NAND block */
     . = ALIGN(0x20000);
diff --git a/board/amcc/katmai/katmai.c b/board/amcc/katmai/katmai.c
index 15291f9..0bbc75e 100644
--- a/board/amcc/katmai/katmai.c
+++ b/board/amcc/katmai/katmai.c
@@ -249,7 +249,7 @@
 }
 
 /*
- * Override the default functions in arch/ppc/cpu/ppc4xx/44x_spd_ddr2.c with
+ * Override the default functions in arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c with
  * board specific values.
  */
 u32 ddr_wrdtr(u32 default_val) {
diff --git a/board/amcc/kilauea/u-boot-nand.lds b/board/amcc/kilauea/u-boot-nand.lds
index bfca582..e256b19 100644
--- a/board/amcc/kilauea/u-boot-nand.lds
+++ b/board/amcc/kilauea/u-boot-nand.lds
@@ -53,7 +53,7 @@
     /* WARNING - the following is hand-optimized to fit within	*/
     /* the sector layout of our flash chips!	XXX FIXME XXX	*/
 
-    arch/ppc/cpu/ppc4xx/start.o	(.text)
+    arch/powerpc/cpu/ppc4xx/start.o	(.text)
 
     /* Align to next NAND block */
     . = ALIGN(0x4000);
diff --git a/board/amcc/luan/luan.c b/board/amcc/luan/luan.c
index 6542565..4e12e9a 100644
--- a/board/amcc/luan/luan.c
+++ b/board/amcc/luan/luan.c
@@ -119,7 +119,7 @@
 }
 
 /*
- * Override the default functions in arch/ppc/cpu/ppc4xx/44x_spd_ddr2.c with
+ * Override the default functions in arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c with
  * board specific values.
  */
 u32 ddr_clktr(u32 default_val) {
diff --git a/board/amcc/sequoia/sdram.c b/board/amcc/sequoia/sdram.c
index b5c7d6d..cabeceb 100644
--- a/board/amcc/sequoia/sdram.c
+++ b/board/amcc/sequoia/sdram.c
@@ -40,7 +40,7 @@
 extern void denali_core_search_data_eye(void);
 
 #if defined(CONFIG_NAND_SPL)
-/* Using arch/ppc/cpu/ppc4xx/speed.c to calculate the bus frequency is too big
+/* Using arch/powerpc/cpu/ppc4xx/speed.c to calculate the bus frequency is too big
  * for the 4k NAND boot image so define bus_frequency to 133MHz here
  * which is save for the refresh counter setup.
  */
diff --git a/board/amcc/sequoia/u-boot-nand.lds b/board/amcc/sequoia/u-boot-nand.lds
index 8a71bfa..cf4229a 100644
--- a/board/amcc/sequoia/u-boot-nand.lds
+++ b/board/amcc/sequoia/u-boot-nand.lds
@@ -53,7 +53,7 @@
     /* WARNING - the following is hand-optimized to fit within	*/
     /* the sector layout of our flash chips!	XXX FIXME XXX	*/
 
-    arch/ppc/cpu/ppc4xx/start.o	(.text)
+    arch/powerpc/cpu/ppc4xx/start.o	(.text)
 
     /* Align to next NAND block */
     . = ALIGN(0x4000);
diff --git a/board/amcc/sequoia/u-boot-ram.lds b/board/amcc/sequoia/u-boot-ram.lds
index c6a321e..63e87c9 100644
--- a/board/amcc/sequoia/u-boot-ram.lds
+++ b/board/amcc/sequoia/u-boot-ram.lds
@@ -50,7 +50,7 @@
   .plt : { *(.plt) }
   .text      :
   {
-    arch/ppc/cpu/ppc4xx/start.o	(.text)
+    arch/powerpc/cpu/ppc4xx/start.o	(.text)
 
     *(.text)
     *(.got1)
diff --git a/board/amcc/yucca/yucca.c b/board/amcc/yucca/yucca.c
index 241f484..0d23929 100644
--- a/board/amcc/yucca/yucca.c
+++ b/board/amcc/yucca/yucca.c
@@ -555,7 +555,7 @@
 }
 
 /*
- * Override the default functions in arch/ppc/cpu/ppc4xx/44x_spd_ddr2.c with
+ * Override the default functions in arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c with
  * board specific values.
  */
 static int ppc440spe_rev_a(void)