keymile: Remove CONFIG_SYS_APP{1, 2}_{BASE, SIZE}

CONFIG_SYS_APP1_BASE, CONFIG_SYS_APP2_BASE, CONFIG_SYS_APP1_SIZE, and
CONFIG_SYS_APP2_SIZE are no longer used in the keymile config files
(they were used for setting values, which were converted to Kconfig
earlier in the series).

Remove them from the configs and the whitelist.

Signed-off-by: Mario Six <mario.six@gdsys.cc>