Please pull u-boot-x86

[Bin Meng]

Hi Tom,

This PR includes the following x86 changes for v2021.04:

- Fix broken multi-core boot for QEMU x86
- Add zboot support to boot x86 Linux kernel image in the PXE sysboot utility

Azure results: PASS
https://dev.azure.com/bmeng/GitHub/_build/results?buildId=320&view=results

The following changes since commit fdcb93e1709ab1a2ebb562455621617c29e2099c:

  Merge branch '2021-02-01-assorted-fixes' (2021-02-02 09:24:10 -0500)

are available in the git repository at:

  https://gitlab.denx.de/u-boot/custodians/u-boot-x86

for you to fetch changes up to 18c25821836b4673aa67a43c792a4a82480f47fa:

  cmd: pxe_utils: sysboot: Add zboot support to boot x86 Linux kernel
image (2021-02-03 23:16:44 +0800)

----------------------------------------------------------------
Bin Meng (1):
      x86: qemu: Fix broken multi-core boot

Kory Maincent (3):
      command.h: Remove extern from the header
      cmd: pxe_utils: Replace ifdef by IS_ENABLED
      cmd: pxe_utils: sysboot: Add zboot support to boot x86 Linux kernel image

 arch/x86/cpu/qfw_cpu.c |  6 ++++++
 cmd/pxe_utils.c        | 53
+++++++++++++++++++++++++++--------------------------
 include/command.h      | 57
++++++++++++++++++++++++++++++---------------------------
 3 files changed, 63 insertions(+), 53 deletions(-)

Regards,
Bin