Build: Make tfm_boot_status private in tfm_sprt

The main head file in tfm_boot_status is tfm_boot_status.h. To make it
more specific, it can be moved under an individual directory.

tfm_boot_status is required by FWU and attestation. This patch makes
tfm_sprt link the tfm_boot_status as PRIVATE. So FWU and attestation
have to explicitly link tfm_boot_status.

Signed-off-by: Jianliang Shen <jianliang.shen@arm.com>
Change-Id: I422ffbca1ead9611b3e89697ac891231945726f8
4 files changed