x86: compile C files based on TARGET_ARCH

TARGET_ARCH_VARIANT is used in the build to distinguish between
different kinds of x86 processors (atom, ivy bridge, etc.) For
the paths referenced there is only 'x86', so use TARGET_ARCH
instead.

Change-Id: I3add06082537af00ac980b00f2c81e070b86af00
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
1 file changed