Randconfig build fix for recent SoC changes for v5.6
We can get build failures if let's say if only am335x SoC is selected.
Let's fix this by always building secure-common.
* tag 'omap-for-v5.6/soc-build-fix-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Fix undefined reference to omap_secure_init
Link: https://lore.kernel.org/r/pull-1579896427-50330@atomide.com
Signed-off-by: Olof Johansson <olof@lixom.net>