payloads/external/iPXE: Update revision to 2025.03

Update iPXE revision so that coreboot can be built with newer
toolchains.

Upstream-Status: Inappropriate [custom configs]
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>

Author: miczyg1

payloads/external/iPXE/Kconfig

@@ -54,12 +54,12 @@ choice
 	default IPXE_STABLE
 
 config IPXE_STABLE
-	bool "2023.8"
+	bool "2025.03"
 	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 August, 2023.
+	  This is iPXE from the end of March, 2025.
 
 config IPXE_MASTER
 	bool "master"

payloads/external/iPXE/Makefile

@@ -4,7 +4,7 @@
 # When updating, change the name both here and in payloads/external/iPXE/Kconfig
 
 # Temporarily Dasharo fork is used until i225/i226 native support is merged.
-STABLE_COMMIT_ID=63ed3e352f2e65b26b15a847961440cb4dad0318
+STABLE_COMMIT_ID=8b8a50a85d4763da6d353719d6022d01c7a09751
 
 TAG-$(CONFIG_IPXE_MASTER)=origin/master
 TAG-$(CONFIG_IPXE_STABLE)=$(STABLE_COMMIT_ID)