meta-aspeed:conf/machine: tunes files moved to arch dirs

Upstream yocto moved the tune files under architecture subdirectories
so need to adjust our includes of them.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I442f1403a869a117244461c8f94f940cfe7c08cd
diff --git a/meta-aspeed/conf/machine/include/ast2400.inc b/meta-aspeed/conf/machine/include/ast2400.inc
index 6284a2b..cc99db0 100644
--- a/meta-aspeed/conf/machine/include/ast2400.inc
+++ b/meta-aspeed/conf/machine/include/ast2400.inc
@@ -1,4 +1,4 @@
 SOC_FAMILY = "aspeed-g4"
 include conf/machine/include/soc-family.inc
 require conf/machine/include/aspeed.inc
-require conf/machine/include/tune-arm926ejs.inc
+require conf/machine/include/arm/armv5/tune-arm926ejs.inc