kernel: add missing config symbols
Kconfig symbols CONFIG_ARM64_CNP and CONFIG_ARM64_EPAN got exposed
by enabling CONFIG_ARM64_PAN. Enable them as well, as just like for
PAN, also EPAN and CNP will be detected at runtime at no cost.
Fixes: a2662309aa ("kernel: Enable CONFIG_ARM64_PAN to restrict kernel access to user space memory")
Signed-off-by: Daniel Golle <[email protected]>