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.alaska8220 b/doc/README.alaska8220
index 9249cfb..3345073 100644
--- a/doc/README.alaska8220
+++ b/doc/README.alaska8220
@@ -22,7 +22,7 @@
 - include/asm-ppc/global_data.h added global variables - inp_clk, pci_clk,
 			    vco_clk, pev_clk, flb_clk, and bExtUart
 
-- arch/ppc/lib/board.c	    added CONFIG_MPC8220 support
+- arch/powerpc/lib/board.c	    added CONFIG_MPC8220 support
 
 - net/eth.c		    added FEC support for MPC8220
 
@@ -37,24 +37,24 @@
 - board/alaska/config.mk    config make
 - board/alaska/u-boot.lds   Linker description
 
-- arch/ppc/cpu/mpc8220/dma.h	    multi-channel dma header file
-- arch/ppc/cpu/mpc8220/dramSetup.h   dram setup header file
-- arch/ppc/cpu/mpc8220/fec.h	    MPC8220 FEC header file
-- arch/ppc/cpu/mpc8220/cpu.c	    cpu specific code
-- arch/ppc/cpu/mpc8220/cpu_init.c    Flexbus ChipSelect and Mux pins setup
-- arch/ppc/cpu/mpc8220/dramSetup.c   MPC8220 DDR SDRAM setup
-- arch/ppc/cpu/mpc8220/fec.c	    MPC8220 FEC driver
-- arch/ppc/cpu/mpc8220/i2c.c	    MPC8220 I2C driver
-- arch/ppc/cpu/mpc8220/interrupts.c  interrupt support (not enable)
-- arch/ppc/cpu/mpc8220/loadtask.c    load dma
-- arch/ppc/cpu/mpc8220/speed.c	    system, pci, flexbus, pev, and cpu clock
-- arch/ppc/cpu/mpc8220/traps.c	    exception
-- arch/ppc/cpu/mpc8220/uart.c	    MPC8220 UART driver
-- arch/ppc/cpu/mpc8220/Makefile	    Makefile
-- arch/ppc/cpu/mpc8220/config.mk	    config make
-- arch/ppc/cpu/mpc8220/fec_dma_task.S MPC8220 FEC multi-channel dma program
-- arch/ppc/cpu/mpc8220/io.S	    io functions
-- arch/ppc/cpu/mpc8220/start.S	    start up
+- arch/powerpc/cpu/mpc8220/dma.h	    multi-channel dma header file
+- arch/powerpc/cpu/mpc8220/dramSetup.h   dram setup header file
+- arch/powerpc/cpu/mpc8220/fec.h	    MPC8220 FEC header file
+- arch/powerpc/cpu/mpc8220/cpu.c	    cpu specific code
+- arch/powerpc/cpu/mpc8220/cpu_init.c    Flexbus ChipSelect and Mux pins setup
+- arch/powerpc/cpu/mpc8220/dramSetup.c   MPC8220 DDR SDRAM setup
+- arch/powerpc/cpu/mpc8220/fec.c	    MPC8220 FEC driver
+- arch/powerpc/cpu/mpc8220/i2c.c	    MPC8220 I2C driver
+- arch/powerpc/cpu/mpc8220/interrupts.c  interrupt support (not enable)
+- arch/powerpc/cpu/mpc8220/loadtask.c    load dma
+- arch/powerpc/cpu/mpc8220/speed.c	    system, pci, flexbus, pev, and cpu clock
+- arch/powerpc/cpu/mpc8220/traps.c	    exception
+- arch/powerpc/cpu/mpc8220/uart.c	    MPC8220 UART driver
+- arch/powerpc/cpu/mpc8220/Makefile	    Makefile
+- arch/powerpc/cpu/mpc8220/config.mk	    config make
+- arch/powerpc/cpu/mpc8220/fec_dma_task.S MPC8220 FEC multi-channel dma program
+- arch/powerpc/cpu/mpc8220/io.S	    io functions
+- arch/powerpc/cpu/mpc8220/start.S	    start up
 
 - include/mpc8220.h