[U-Boot] Update OMAP5 "unmap first page" patch series

[Vincent Stehlé]

Hi,

Here is a proposed updated patch series to unmap page 0 on OMAP5, rebased on
denx/master:

  [PATCH v4 1/3] ARM: cache: declare set_section_dcache
  [PATCH v4 2/3] ARM: cache: introduce weak arm_setup_identity_mapping
  [PATCH v4 3/3] ARM: OMAP5: redefine arm_setup_identity_mapping

Necessary adaptations have been done to follow set_section_dcache() changes.

Happy new year,

V.