SeaBIOS: update stable release from 1.7.5 to 1.8.2

Several USB timing fixes for USB controllers on real hardware
Initial support for USB3 hubs
Initial support for SD cards (on QEMU only)
Initial support for transitioning to 32bit mode using SMIs (on QEMU TCG only)
SeaVGABIOS improvements:
 Added cursor emulation to coreboot native init vgabios (cbvga)
 Added support for read character calls when in graphics mode

Change-Id: Ic99f11dea4c87dbf3e9de4ce7f14064d0a083101
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: http://review.coreboot.org/11479
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/payloads/external/SeaBIOS/Kconfig b/payloads/external/SeaBIOS/Kconfig
index 699b986..6224697 100644
--- a/payloads/external/SeaBIOS/Kconfig
+++ b/payloads/external/SeaBIOS/Kconfig
@@ -5,7 +5,7 @@
 	default SEABIOS_STABLE
 
 config SEABIOS_STABLE
-	bool "1.7.5"
+	bool "1.8.2"
 	help
 	  Stable SeaBIOS version
 config SEABIOS_MASTER
diff --git a/payloads/external/SeaBIOS/Makefile.inc b/payloads/external/SeaBIOS/Makefile.inc
index 7fb63d4..ec877a9 100644
--- a/payloads/external/SeaBIOS/Makefile.inc
+++ b/payloads/external/SeaBIOS/Makefile.inc
@@ -1,5 +1,5 @@
 TAG-$(CONFIG_SEABIOS_MASTER)=origin/master
-TAG-$(CONFIG_SEABIOS_STABLE)=e51488c5f8800a52ac5c8da7a31b85cca5cc95d2
+TAG-$(CONFIG_SEABIOS_STABLE)=33fbe13a3e2a01e0ba1087a8feed801a0451db21
 
 unexport KCONFIG_AUTOHEADER
 unexport KCONFIG_AUTOCONFIG