uboot-tegra: bump to 2019.04

This version has important change for tegra boards which is reserving
32MB memory for Linux kernel instead of current 16MB.

Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>

package/boot/uboot-tegra/Makefile

@@ -6,10 +6,10 @@
 #
 include $(TOPDIR)/rules.mk
 
-PKG_VERSION := 2019.01
+PKG_VERSION := 2019.04
 PKG_RELEASE := 1
 
-PKG_HASH := 50bd7e5a466ab828914d080d5f6a432345b500e8fba1ad3b7b61e95e60d51c22
+PKG_HASH := 76b7772d156b3ddd7644c8a1736081e55b78828537ff714065d21dbade229bef
 
 PKG_MAINTAINER := Tomasz Maciej Nowak <tomek_n@o2.pl>