74xx_7xx/mpc86xx/ppmc7xx: Fix do_reset() declaration

The following commit:

commit 882b7d726febe65579d6502c271412ecb05821d7
Author: Mike Frysinger <vapier@gentoo.org>
Date:   Wed Oct 20 03:41:17 2010 -0400

    do_reset: unify duplicate prototypes

missed the 74xx_7xx and mpc86xx arches and the ppmc7xx board do_reset()
functions which resulted in build errors such as:
  cpu.c:128: error: conflicting types for 'do_reset'
  include/command.h:102: error: previous declaration of 'do_reset' was here

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/arch/powerpc/cpu/74xx_7xx/cpu.c b/arch/powerpc/cpu/74xx_7xx/cpu.c
index ab6f11d..b6a31b4 100644
--- a/arch/powerpc/cpu/74xx_7xx/cpu.c
+++ b/arch/powerpc/cpu/74xx_7xx/cpu.c
@@ -234,8 +234,7 @@
     !defined(CONFIG_ELPPC)   && \
     !defined(CONFIG_PPMC7XX)
 /* no generic way to do board reset. simply call soft_reset. */
-void
-do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	ulong addr;
 	/* flush and disable I/D cache */
@@ -263,7 +262,12 @@
 	addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong);
 #endif
 	soft_restart(addr);
-	while(1);	/* not reached */
+
+	/* not reached */
+	while(1)
+		;
+
+	return 1;
 }
 #endif