temp/u-boot-librem5: enable efidebug, enable auto update (MR 2842)

This enables an auto-update mechanism on post-upgrade for the u-boot
firmware on the librem 5 and librem 5 devkit. This mechanism is largely
copied from the implementation in the pinephone u-boot package.

efidebug is useful for booting the kernel via EFI mode in u-boot.

temp/u-boot-librem5/0001-Enable-efidebug-command.patch

@@ -0,0 +1,37 @@
+From 6984c79c9a7a5952ffe324a0a378281d80d1b738 Mon Sep 17 00:00:00 2001
+From: Clayton Craft <clayton@craftyguy.net>
+Date: Wed, 12 Jan 2022 22:41:59 -0800
+Subject: [PATCH] Enable efidebug command
+
+---
+ configs/librem5_defconfig        | 1 +
+ configs/librem5_devkit_defconfig | 1 +
+ 2 files changed, 2 insertions(+)
+
+diff --git a/configs/librem5_defconfig b/configs/librem5_defconfig
+index 3ec5ddc155..45f1b3b545 100644
+--- a/configs/librem5_defconfig
++++ b/configs/librem5_defconfig
+@@ -21,6 +21,7 @@ CONFIG_CMD_GPIO=y
+ CONFIG_CMD_I2C=y
+ CONFIG_CMD_SF=y
+ CONFIG_CMD_CACHE=y
++CONFIG_CMD_EFIDEBUG=y
+ CONFIG_CMD_REGULATOR=y
+ CONFIG_CMD_EXT4_WRITE=y
+ CONFIG_OF_CONTROL=y
+diff --git a/configs/librem5_devkit_defconfig b/configs/librem5_devkit_defconfig
+index ec9e74feb8..2f76984860 100644
+--- a/configs/librem5_devkit_defconfig
++++ b/configs/librem5_devkit_defconfig
+@@ -21,6 +21,7 @@ CONFIG_CMD_GPIO=y
+ CONFIG_CMD_I2C=y
+ CONFIG_CMD_SF=y
+ CONFIG_CMD_CACHE=y
++CONFIG_CMD_EFIDEBUG=y
+ CONFIG_CMD_REGULATOR=y
+ CONFIG_CMD_EXT4_WRITE=y
+ CONFIG_OF_CONTROL=y
+-- 
+2.34.1
+