linux-yocto/4.18: remove obselete bsp configuration options
Integrating the following commits to remove kernel config audit warnings:
3ea2052ace1 common-pc: Drop the x2apic feature
1fec700ec479 beaglebone: Clean up the cfg file
1b97e53dcd11 beaglebone: Drop the needless unsetting of the kernel options
c6c68c3622d0 beaglebone: Drop the obsolete kernel options
552c9a3f3023 edgerouter: Drop the obsolete kernel options
3a62e42dfb89 mpc8315e-rdb: Drop the obsolete kernel options
Signed-off-by: Kevin Hao <kexin.hao@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
