km/common: check test_bank and testpin for testboot

If the testpin is asserted, first check if a test_bank
variable is defined before trying to boot this
test_bank.

Signed-off-by: Thomas Herzmann <thomas.herzmann@keymile.com>
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
2 files changed