payloads/iPXE: Update stable version from 2019.3 to to 2022.1

Update iPXE stable from commit id ebf2eaf515:
Mar 18 10:24:08 2019 +0000
[intel] Add PCI ID for I219-V and -LM 6 to 9

to commit id 6ba671acd9:
Jan 17 16:17:17 2022 +0000
[efi] Attempt to fetch autoexec script via TFTP

This brings in 424 new commits and fixes the build with coreboot-sdk
2021-09-23_b0d87f753c.

TEST=Build PC Engines apu2 board and boot it over network with the
iPXE

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: Ide12a3a3082f9ea027e180518a80e6c0772b1232
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62289
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/payloads/external/iPXE/Kconfig b/payloads/external/iPXE/Kconfig
index 6c8049a..645d41b 100644
--- a/payloads/external/iPXE/Kconfig
+++ b/payloads/external/iPXE/Kconfig
@@ -31,12 +31,12 @@
 	depends on BUILD_IPXE
 
 config IPXE_STABLE
-	bool "2019.3"
+	bool "2022.1"
 	help
 	  iPXE uses a rolling release with no stable version, for
 	  reproducibility, use the last commit of a given month as the
 	  'stable' version.
-	  This is iPXE from the end of March, 2019.
+	  This is iPXE from the end of January, 2022.
 
 config IPXE_MASTER
 	bool "master"
diff --git a/payloads/external/iPXE/Makefile b/payloads/external/iPXE/Makefile
index 3e12f61..b6aa1b6 100644
--- a/payloads/external/iPXE/Makefile
+++ b/payloads/external/iPXE/Makefile
@@ -1,8 +1,8 @@
 ## SPDX-License-Identifier: GPL-2.0-only
 
-# 2019.3 - Last commit of March 2019
+# 2022.1 - Last commit of January 2022
 # When updating, change the name both here and in payloads/external/iPXE/Kconfig
-STABLE_COMMIT_ID=ebf2eaf515e46abd43bc798e7e4ba77bfe529218
+STABLE_COMMIT_ID=6ba671acd922ee046b257c5119b8a0f64d275473
 
 TAG-$(CONFIG_IPXE_MASTER)=origin/master
 TAG-$(CONFIG_IPXE_STABLE)=$(STABLE_COMMIT_ID)