boot/arm-trusted-firmware: bump lts-v2.8 to v2.8.20

bump the lts-v2.8.x branch to v2.8.20. Our patch still applies.

Signed-off-by: Bryan Brattlof <bb@ti.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

boot/arm-trusted-firmware/Config.in

@@ -48,7 +48,7 @@ config BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_VERSION_VALUE
 config BR2_TARGET_ARM_TRUSTED_FIRMWARE_VERSION
 	string
 	default "v2.11"		if BR2_TARGET_ARM_TRUSTED_FIRMWARE_LATEST_VERSION
-	default "lts-v2.8.13"	if BR2_TARGET_ARM_TRUSTED_FIRMWARE_LATEST_LTS_2_8_VERSION
+	default "lts-v2.8.20"	if BR2_TARGET_ARM_TRUSTED_FIRMWARE_LATEST_LTS_2_8_VERSION
 	default "custom"	if BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_TARBALL
 	default BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_REPO_VERSION \
 				if BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_GIT

boot/arm-trusted-firmware/arm-trusted-firmware.hash

@@ -1,4 +1,4 @@
 # Locally calculated
 sha256  c0f23ccc71c49989e9ad238acf334473c17b7c88f79a20c829c3d443e3794a22  arm-trusted-firmware-v2.11-git4.tar.gz
-sha256  695ae232fef6da931157e032b520f145b2c4cbe675d92b6a12222a332e960e89  arm-trusted-firmware-lts-v2.8.13-git4.tar.gz
+sha256  a90617cc2c1791c98d36b9e3d9a7f3f77029897e00c4279ff4ef559b769e9d7b  arm-trusted-firmware-lts-v2.8.20-git4.tar.gz
 sha256  03d5088ff4fbfe989f3c807117356191c263cf27d62ee6916bde8532611728ed  docs/license.rst