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.TQM8260 b/doc/README.TQM8260
index e64e64a..93b5506 100644
--- a/doc/README.TQM8260
+++ b/doc/README.TQM8260
@@ -14,10 +14,10 @@
 
 MAKEALL			- TQM8260 entry added
 Makefile		- TQM8260_config entry added
-arch/ppc/cpu/mpc8260/Makefile	- soft_i2c.o module added
-arch/ppc/cpu/mpc8260/ether_scc.c	- TQM8260-specific definitions added, an obvious
+arch/powerpc/cpu/mpc8260/Makefile	- soft_i2c.o module added
+arch/powerpc/cpu/mpc8260/ether_scc.c	- TQM8260-specific definitions added, an obvious
 			  bug fixed (fcr -> scr)
-arch/ppc/cpu/mpc8260/ether_fcc.c	- TQM8260-specific definitions added
+arch/powerpc/cpu/mpc8260/ether_fcc.c	- TQM8260-specific definitions added
 include/flash.h		- added definitions for the AM29LV640D Flash chip
 
 
@@ -33,7 +33,7 @@
 board/tqm8260/flash.c	  - flash driver (for AM29LV640D)
 board/tqm8260/ppcboot.lds - linker script
 board/tqm8260/tqm8260.c	  - ioport and memory initialization
-arch/ppc/cpu/mpc8260/soft_i2c.c	  - software i2c EEPROM driver
+arch/powerpc/cpu/mpc8260/soft_i2c.c	  - software i2c EEPROM driver
 include/config_TQM8260.h  - main configuration file