Documentation/releases: Add more c-env-bb platforms for 4.11

Change-Id: Ie5c83befc8e595016c63729a19e7e71438c996b5
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36919
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>

Documentation/releases/coreboot-4.11-relnotes.md

@@ -94,6 +94,8 @@ UPPER CASE commands and libpayload knows how to deal with USB3 hubs.
 * intel/nehalem
 
 ### Moved the following platforms to C_ENVIRONMENT_BOOTBLOCK:
+* intel/i945
+* intel/x4x
 * intel/gm45
 * intel/nehalem
 * intel/braswell