kernel: Add missing mediatek configuration options

kernel: Add missing mediatek configuration options

When building the mediatek/mt7629 target in OpenWrt 22.03 the kernel
does not have a configuration option for CONFIG_CRYPTO_DEV_MEDIATEK. Add
this option to the generic kernel configuration and also add two other
configuration options which are removed when we refresh the mt7629
kernel configuration.

Fixes: 2bea35cb55d7 ("mediatek: remove crypto-hw-mtk package")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit dcc0fe24ea216d32300c0f01c8879e586d89cc1e)
(cherry picked from commit bfd070e7fa5ad715fb1a8f8449ab5d7750c59338)