[fedora-arm] Kernel update -> 5.15.13-200.fc35.aarch64

Enthused by my success with getting Fedora 35 going on mu rpi4, I thought I would try an update :) Starting from Fedora-Minimal-35-1.2.aarch64.raw.xz, I tried to upgrade the kernel from 5.14.10-300.fc35.aarch64 to 5.15.13-200.fc35.aarch64. So, I did a(n) rpi-uboot-update then dnf update kernel -y init 0 Power off/on Connect HDMI monitor, and *nothing* after the grub spiel. Just sayin', in case it helps anyone :(