Since the bump to 2026.04, tools/Kconfig defaults TOOLS_MKEFICAPSULE to
y whenever EFI_LOADER is set, which the Zynq configs enable. The host
tool includes <gnutls/gnutls.h>, which the build system does not
provide, so the package fails to compile. Disable the tool, as the
other U-Boot packages carrying an EFI_LOADER config already do.
Fixes: d51c611e71 ("uboot-zynq: bump to 2026.04")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>