Merge patch series "some serial rx buffer patches"

Rasmus Villemoes <ravi@prevas.dk> says:

Some small improvements to the serial rx buffer feature.

CI seems happy: https://github.com/u-boot/u-boot/pull/674

Link: https://lore.kernel.org/r/20241003141029.920035-1-ravi@prevas.dk

diff --cc drivers/serial/serial-uclass.c
Simple merge