Merge branch '2021.04-rc' of https://github.com/lftan/u-boot

- Add ATF flow for SoC64 devices
- Update socfpgaimage to support print header and update padding flow

diff --cc board/altera/stratix10-socdk/MAINTAINERS
index 6192bc9,6192bc9..6efd0cf
--- 1/board/altera/stratix10-socdk/MAINTAINERS
--- 2/board/altera/stratix10-socdk/MAINTAINERS
+++ b/board/altera/stratix10-socdk/MAINTAINERS
@@@ -4,4 -4,4 +4,5 @@@ M:       Dinh Nguyen <dinh.nguyen@intel.com
  S:    Maintained
  F:    board/altera/stratix10-socdk/
  F:    include/configs/socfpga_stratix10_socdk.h
++F:    configs/socfpga_stratix10_atf_defconfig
  F:    configs/socfpga_stratix10_defconfig

diff --cc board/intel/agilex-socdk/MAINTAINERS
index b8e28f0,b8e28f0..18edbdc
--- 1/board/intel/agilex-socdk/MAINTAINERS
--- 2/board/intel/agilex-socdk/MAINTAINERS
+++ b/board/intel/agilex-socdk/MAINTAINERS
@@@ -4,4 -4,4 +4,5 @@@ M:       Chee Hong Ang <chee.hong.ang@intel.c
  S:    Maintained
  F:    board/intel/agilex-socdk/
  F:    include/configs/socfpga_agilex_socdk.h
++F:    configs/socfpga_agilex_atf_defconfig
  F:    configs/socfpga_agilex_defconfig