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/doc/README.PIP405 b/doc/README.PIP405
index e8a6541..012db1c 100644
--- a/doc/README.PIP405
+++ b/doc/README.PIP405
@@ -17,11 +17,11 @@
 				added console settings from environment
 - common/devices.c		added ISA keyboard init
 - common/main.c			corrected the read of bootdelay
-- arch/ppc/cpu/ppc4xx/405gp_pci.c	excluded file from PIP405
-- arch/ppc/cpu/ppc4xx/i2c.c		added 16bit read write I2C support
+- arch/powerpc/cpu/ppc4xx/405gp_pci.c	excluded file from PIP405
+- arch/powerpc/cpu/ppc4xx/i2c.c		added 16bit read write I2C support
 				added page write
-- arch/ppc/cpu/ppc4xx/speed.c		added get_PCI_freq
-- arch/ppc/cpu/ppc4xx/start.S		added CONFIG_IDENT_STRING
+- arch/powerpc/cpu/ppc4xx/speed.c		added get_PCI_freq
+- arch/powerpc/cpu/ppc4xx/start.S		added CONFIG_IDENT_STRING
 - disk/Makefile			added part_iso for CD support
 - disk/part.c			changed to work with block device description
 				added ISO CD support
@@ -275,7 +275,7 @@
 "U_BOOT_VERSION __TIME__ DATE___ " String, to allows to identify intermidiate
 and custom versions.
 Changed files:
-- arch/ppc/cpu/ppc4xx/start.s
+- arch/powerpc/cpu/ppc4xx/start.s
 
 Firmware Image:
 ---------------
@@ -288,11 +288,11 @@
 
 Correct PCI Frequency for PPC405:
 ---------------------------------
-Added function (in arch/ppc/cpu/ppc4xx/speed.c) to get the PCI frequency for PPC405 CPU.
+Added function (in arch/powerpc/cpu/ppc4xx/speed.c) to get the PCI frequency for PPC405 CPU.
 The PCI Frequency will now be set correct in the board description in common/board.c.
 (was set to the busfreq before).
 Changed files:
-- arch/ppc/cpu/ppc4xx/speed.c
+- arch/powerpc/cpu/ppc4xx/speed.c
 - common/board.c
 
 I2C Stuff:
@@ -301,7 +301,7 @@
 Added 16bit read/write support for I2C (PPC405), and page write to
 I2C EEPROM if defined CONFIG_SYS_EEPROM_PAGE_WRITE_ENABLE.
 Changed files:
-- arch/ppc/cpu/ppc4xx/i2c.c
+- arch/powerpc/cpu/ppc4xx/i2c.c
 - common/cmd_i2c.c
 
 Environment / Console: