BL2: Add command line option to enable MCUBOOT_USE_PSA_CRYPTO

Add the option to enable MCUBOOT_USE_PSA_CRYPTO by passing it
through Cmake configuration step using the -DMCUBOOT_USE_PSA_CRYPTO=ON.
Amend Kconfig menu as well.

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: I8445b7bb94c52e61a7d02730995f4723be9ac78a
3 files changed