Remove kmod-crypto-arc4 and kmod-crypto-ecb from depends, as it no
longer uses skcipher API for encryption.
Remove the non-existent CONFIG_PPP_MPPE_MPPC symbol.
Signed-off-by: Qingfang Deng <dqfext@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/23464
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>