meta-facebook: meta-yosemitev2: switch u-boot to 2019.04

Switching the u-boot branch from the 2016.07-aspeed-openbmc
to the 2019.04-aspeed-openbmc

Added the config file to modify the defconfig file from
the uboot-machine.
Removing the files related to the 2016.07-aspeed branch.

Tested: Tested in YosemiteV2 platform and Verified.

Signed-off-by: Logananth Sundararaj <logananth_s@hcl.com>
Change-Id: I2687d92bba5dcf7602440b3ae59113093e09e379
diff --git a/meta-facebook/meta-yosemitev2/conf/machine/yosemitev2.conf b/meta-facebook/meta-yosemitev2/conf/machine/yosemitev2.conf
index 2573a4e..4a52054 100644
--- a/meta-facebook/meta-yosemitev2/conf/machine/yosemitev2.conf
+++ b/meta-facebook/meta-yosemitev2/conf/machine/yosemitev2.conf
@@ -1,10 +1,12 @@
 KMACHINE = "aspeed"
 KERNEL_DEVICETREE = "${KMACHINE}-bmc-facebook-${MACHINE}.dtb"
 
-PREFERRED_PROVIDER_virtual/bootloader = "u-boot-aspeed"
-PREFERRED_PROVIDER_u-boot = "u-boot-aspeed"
-PREFERRED_PROVIDER_u-boot-fw-utils = "u-boot-fw-utils-aspeed"
-UBOOT_MACHINE = "ast_g5_ncsi_config"
+PREFERRED_PROVIDER_virtual/bootloader = "u-boot-aspeed-sdk"
+PREFERRED_PROVIDER_u-boot = "u-boot-aspeed-sdk"
+PREFERRED_PROVIDER_u-boot-fw-utils = "u-boot-fw-utils-aspeed-sdk"
+
+UBOOT_DEVICETREE = "ast2500-evb"
+UBOOT_MACHINE = "evb-ast2500_defconfig"
 
 require conf/machine/include/facebook-compute-multihost.inc
 require conf/machine/include/ast2500.inc