Add NVRAM and hint on how to make it persistent. Also update Linux
boot section which should now boot automatically with the new NVRAM
defaults so manual settings in menu may not be needed normally.
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Message-ID: <20250304205926.87E364E6010@zero.eik.bme.hu>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
0f17ae24b5