u-boot: update to 2019.01 (incl. mainline Pine A64 support)

Wasn't tested yet, but I tested HEAD~1 at the shown date and the Pine booted.

The Pine boots, Weston shows on a HDMI display.

See also !153 (merged)

device/device-pine-a64lts/APKBUILD

@@ -2,7 +2,7 @@
 pkgname="device-pine-a64lts"
 pkgdesc="PINE A64-LTS"
 pkgver=0.1
-pkgrel=2
+pkgrel=3
 url="https://postmarketos.org"
 license="MIT"
 arch="aarch64"
@@ -26,5 +26,5 @@ package() {
 
 }
 
-sha512sums="befade7c6b8bbefe812b61afb4718acfdc4f6afb884e3538db726b98d2588286aa811548c248f1e87ab3d190df7b12e2195375ff7757463d519da1d65f3f1f66  deviceinfo
+sha512sums="c7f20912c17ce4686ca06a3249d7b33a2df5c7cc3856a733365bbc2e3addc6feb3ac97d4a754c319e1a27828f40a70296ccf13ff884652af744025cea30e0a7c  deviceinfo
 ef7d21144b8c33f80968a6a089dcc6b568abd54f66f30d21d5befc10e51217484440aa8edb1065cd871ffba7bc599f44502bb6d240ee01f59dc92706ec6eabfd  uboot-script.cmd"