soc.mk: do not clobber TARGET_KERNEL_CONFIGS

This variable is a list of multiple kconf entries, so don't clobber it.

BUG=b/27675566
TEST=built edison w/custom settings and it works now

Change-Id: If6bdf872a6431b06c4cb5d1811db111a05d98995
1 file changed
tree: 5220211d7bd0c3c35a63277d21a8090240701fca
  1. peripheral/
  2. soc/