[POWERPC] Spelling fixes: arch/ppc/

Spelling fixes in arch/ppc/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/ppc/platforms/katana.c b/arch/ppc/platforms/katana.c
index 720f8b3..c289e9f 100644
--- a/arch/ppc/platforms/katana.c
+++ b/arch/ppc/platforms/katana.c
@@ -880,7 +880,7 @@
 	 * are non-zero, then we should use the board info from the bd_t
 	 * structure and the cmdline pointed to by r6 instead of the
 	 * information from birecs, if any.  Otherwise, use the information
-	 * from birecs as discovered by the preceeding call to
+	 * from birecs as discovered by the preceding call to
 	 * parse_bootinfo().  This rule should work with both PPCBoot, which
 	 * uses a bd_t board info structure, and the kernel boot wrapper,
 	 * which uses birecs.