bug: v/90636
BT_HOST_CRYPTO selects MBEDTLS and MBEDTLS_PSA_CRYPTO_C but does not
select their prerequisite CRYPTO_MBEDTLS. In BLE-only configurations
(without BT_CLASSIC), the dependency chain that normally enables
CRYPTO_MBEDTLS through other paths is broken, causing olddefconfig to
fail with unmet dependency error. Add select CRYPTO_MBEDTLS to ensure
the crypto library is always available when BT_HOST_CRYPTO is enabled.
Signed-off-by: huangyulong3 <huangyulong3@xiaomi.com>