u-boot: Upgrade to 2017.09

This upgrades the U-Boot to the 2017.09 release.

(From OE-Core rev: 340d413f678a4a64dfa060e8fe0ac721b73fed97)

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-bsp/u-boot/u-boot-common_2017.09.inc

@@ -7,7 +7,7 @@ PE = "1"
 
 # We use the revision in order to avoid having to fetch it from the
 # repo during parse
-SRCREV = "d85ca029f257b53a96da6c2fb421e78a003a9943"
+SRCREV = "c98ac3487e413c71e5d36322ef3324b21c6f60f9"
 
 SRC_URI = "git://git.denx.de/u-boot.git \
     file://MPC8315ERDB-enable-DHCP.patch \