systemd: Add backport of EFI_MEMORY_ATTRIBUTE_PROTOCOL warning downgrade patch

systemd: Add backport of EFI_MEMORY_ATTRIBUTE_PROTOCOL warning downgrade patch

Add a backport systemd patch[1] that downgrades the
EFI_MEMORY_ATTRIBUTE_PROTOCOL missing message from warning to debug.

U-Boot does not currently implement EFI_MEMORY_ATTRIBUTE_PROTOCOL,
causing systemd-boot to emit a warning on every boot on EFI 2.10+
platforms. Although the condition is a known U-Boot limitation and
requires no user intervention, the warning triggers log_wait()
behavior, introducing an unnecessary ~2.5-second delay during boot
and negatively impacting boot-time KPIs.

Include the patch in the systemd recipe to suppress this
non-actionable warning, eliminate the associated ~2.5-second boot
delay, and improve boot performance on U-Boot-based systems.

[1] https://github.com/systemd/systemd/pull/43017

Signed-off-by: Aswin Murugan <aswin.murugan@oss.qualcomm.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>