linux-wandboard

MLK-9710-11 Add internal key cover and external blob export/import to prototype SM-API

Extended/amended the prototype SM-API with the following functions:
- Added key covering (blackening) function in-place to a keyslot
- Added export operation to encapsulate data to external memory as a
  secure memory blob (including descriptor capable of secure memory or
  general memory blob generation)
- Removed in-place blob encapsulation
- Added import operation to decapsulate a blob from external memory into
  secure memory (including descriptor capable of general memory or secure
  memory content decapsulation)
- Removed in-place blob decapsulation

[<vicki.milhoan@freescale.com>: Edited to apply to 3.10]
Signed-off-by: Steve Cornelius <steve.cornelius@freescale.com>
Signed-off-by: Victoria Milhoan <vicki.milhoan@freescale.com>

(cherry picked from commit c577769ed0347bb4e3428b5696fb7f209af0a7ad)
Signed-off-by: Dan Douglass <dan.douglass@freescale.com>