meta-ibm: add rainier-1s4u device tree

IBM 1s4u systems required a separate device tree with a few
modifications on top of the standard rainier system.

Change-Id: I50a713448b03238995057d40a3dda844661ed336
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-ibm/conf/machine/p10bmc.conf b/meta-ibm/conf/machine/p10bmc.conf
index ec03271..5b968c1 100644
--- a/meta-ibm/conf/machine/p10bmc.conf
+++ b/meta-ibm/conf/machine/p10bmc.conf
@@ -8,6 +8,7 @@
     "aspeed/aspeed-bmc-ibm-bonnell.dtb \
      aspeed/aspeed-bmc-ibm-rainier.dtb \
      aspeed/aspeed-bmc-ibm-rainier-4u.dtb \
+     aspeed/aspeed-bmc-ibm-rainier-1s4u.dtb \
      aspeed/aspeed-bmc-ibm-everest.dtb"
 UBOOT_MACHINE = "ast2600_openbmc_spl_emmc_defconfig"
 UBOOT_DEVICETREE = "ast2600-p10bmc"