payloads/seabios: Update stable version to 1.16.0

SeaBIOS 1.16.0 was released on March 2nd. Thus, update the stable
version from 1.14.0 to 1.16.0.

Change-Id: I475a9be47171bfbe3b3c2d4d1d14bb753d8575a8
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62575
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
diff --git a/payloads/external/SeaBIOS/Kconfig b/payloads/external/SeaBIOS/Kconfig
index 9aea2d0..d7dd165 100644
--- a/payloads/external/SeaBIOS/Kconfig
+++ b/payloads/external/SeaBIOS/Kconfig
@@ -5,7 +5,7 @@
 	default SEABIOS_STABLE
 
 config SEABIOS_STABLE
-	bool "1.14.0"
+	bool "1.16.0"
 	help
 	  Stable SeaBIOS version
 config SEABIOS_MASTER
diff --git a/payloads/external/SeaBIOS/Makefile b/payloads/external/SeaBIOS/Makefile
index cdcd426..502f4ea 100644
--- a/payloads/external/SeaBIOS/Makefile
+++ b/payloads/external/SeaBIOS/Makefile
@@ -1,5 +1,5 @@
 TAG-$(CONFIG_SEABIOS_MASTER)=origin/master
-TAG-$(CONFIG_SEABIOS_STABLE)=155821a1990b6de78dde5f98fa5ab90e802021e0
+TAG-$(CONFIG_SEABIOS_STABLE)=d239552ce7220e448ae81f41515138f7b9e3c4db
 TAG-$(CONFIG_SEABIOS_REVISION)=$(CONFIG_SEABIOS_REVISION_ID)
 
 project_git_repo=https://review.coreboot.org/seabios.git