u-boot-aspeed: FIT and FDT fixes

Two backports from u-boot master relating to SPL signaturues, and a
patch from Hongwei that was sent to the upstream list.

Heiko Stuebner (2):
      spl: fit: select SPL_HASH_SUPPORT for SPL_FIT_SIGNATURE
      spl: fit: select SPL_CRYPTO_SUPPORT for SPL_FIT_SIGNATURE

Hongwei Zhang (1):
      Common:fdt: Check for error return value

(From meta-aspeed rev: e173b53d6d29d1489853379d78649f70420ca4c7)

Change-Id: I1ad719b86de2a110fef44a27c584e74faedc5748
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-aspeed/recipes-bsp/u-boot/u-boot-common-aspeed-sdk_2019.04.inc b/meta-aspeed/recipes-bsp/u-boot/u-boot-common-aspeed-sdk_2019.04.inc
index cd26d94..9cf7ca1 100644
--- a/meta-aspeed/recipes-bsp/u-boot/u-boot-common-aspeed-sdk_2019.04.inc
+++ b/meta-aspeed/recipes-bsp/u-boot/u-boot-common-aspeed-sdk_2019.04.inc
@@ -8,7 +8,7 @@
 
 # We use the revision in order to avoid having to fetch it from the
 # repo during parse
-SRCREV = "07850c9dfcd720e7668c60e084b397ef78153dd9"
+SRCREV = "90a88ec328b2a9ee6b431217c466c72a32fde47b"
 
 SRC_URI = "git://git@github.com/openbmc/u-boot.git;nobranch=1;protocol=https"