Add eic770x_hsm and fix warm

[Bo Gan]

Use the CEASE instruction as documented in the SoC datasheet to fix
the warm reset issue observed on my EIC7700/Hifive P550. Refer to
PATCH 2/2 for a more detailed description.

Bo Gan (2):
  include: utils/hsm: Add __noreturn attribute for sifive_cease
  platform: generic: eswin: Add eic770x_hsm and fix warm reset issues

 include/sbi_utils/hsm/fdt_hsm_sifive_inst.h |   3 +-
 platform/generic/eswin/eic770x.c            | 105 ++++++++++++++++++--
 platform/generic/eswin/hfp.c                |   4 +-
 platform/generic/include/eswin/eic770x.h    |  20 +++-
 4 files changed, 115 insertions(+), 17 deletions(-)

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2.34.1