rpi3: update U-boot to 2019.01

Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Signed-off-by: Igor Opaniuk <igor.opaniuk@linaro.org>
diff --git a/rpi3.xml b/rpi3.xml
index bfe4dfa..a8dfd92 100644
--- a/rpi3.xml
+++ b/rpi3.xml
@@ -23,5 +23,5 @@
         <project path="arm-trusted-firmware" name="ARM-software/arm-trusted-firmware.git" revision="34efb683e32254b8c325ac3071c5776d243a7b99" />
         <project path="buildroot"            name="buildroot/buildroot.git"               revision="refs/tags/2018.08" clone-depth="1" />
         <project path="firmware"             name="raspberrypi/firmware.git"              revision="refs/tags/1.20170215" clone-depth="1" />
-        <project path="u-boot"               name="u-boot/u-boot.git"                     revision="a032e0a6aed208977f48e78d2cc497b91543beaf" />
+        <project path="u-boot"               name="u-boot/u-boot.git"                     revision="aac0c29d4b8418c5c78b552070ffeda022b16949" />
 </manifest>