security: trusted foundations: fix coarse_page_table_array init

On the first allocation of a coarse page array, explicitly set the
ref_count to 1, rather than incrementing (as the allocator used may
not guarantee a zero initted struct).

Bug 928289

Signed-off-by: Chris Johnson <cwj@nvidia.com>
Reviewed-on: http://git-master/r/77514
(cherry picked from commit 7329d105883f8b5db87a45085cf6c47c234c4126)

Change-Id: Ic33eecfaf0620340dd430dfa43793fbf0bd8ad8f
Signed-off-by: Pritesh Raithatha <praithatha@nvidia.com>
Reviewed-on: http://git-master/r/79998
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>