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 <[email protected]>
Acked-by: Wolfgang Denk <[email protected]>
Acked-by: Detlev Zundel <[email protected]>
Acked-by: Kim Phillips <[email protected]>
Cc: Peter Tyser <[email protected]>
Cc: Anatolij Gustschin <[email protected]>

MAKEALL

@@ -489,7 +489,7 @@ LIST_TSEC="		\
 	${LIST_86xx}	\
 "
 
-LIST_ppc="		\
+LIST_powerpc="		\
 	${LIST_5xx}	\
 	${LIST_512x}	\
 	${LIST_5xxx}	\
@@ -505,6 +505,12 @@ LIST_ppc="		\
 	${LIST_7xx}	\
 "
 
+# Alias "ppc" -> "powerpc" to not break compatibility with older scripts
+# still using "ppc" instead of "powerpc"
+LIST_ppc="		\
+	${LIST_powerpc}	\
+"
+
 #########################################################################
 ## StrongARM Systems
 #########################################################################
@@ -949,8 +955,8 @@ LIST_sparc="gr_xc3s_1500	gr_cpci_ax2000	gr_ep2s60	grsim	grsim_leon2"
 
 #-----------------------------------------------------------------------
 
-#----- for now, just run PPC by default -----
-[ $# = 0 ] && set $LIST_ppc
+#----- for now, just run PowerPC by default -----
+[ $# = 0 ] && set $LIST_powerpc
 
 #-----------------------------------------------------------------------
 
@@ -1006,7 +1012,7 @@ do
 	|microblaze \
 	|mips|mips_el \
 	|nios|nios2 \
-	|ppc|5xx|5xxx|512x|8xx|8220|824x|8260|83xx|85xx|86xx|4xx|7xx|74xx|TSEC \
+	|ppc|powerpc|5xx|5xxx|512x|8xx|8220|824x|8260|83xx|85xx|86xx|4xx|7xx|74xx|TSEC \
 	|sh|sh2|sh3|sh4 \
 	|sparc \
 	|x86|I486 \