fix: update docs to use correct MTE build flag

With the changes made in TF-A commit c282384db, the build flag
ENABLE_FEAT_MTE has been removed and further replaced by the
build flag ENABLE_FEAT_MTE2.

This patch fixes the documentation to reflect the updated
instructions for building TF-A BL31 binary.

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I89cb987922ceb6698b1e6ff599677d1d39657bf0
1 file changed
tree: 6337f471cd36df1f0ef96cd980106430bb49be18
  1. darwin-x64/
  2. generic/
  3. linux-aarch64/
  4. linux-x64/