soc/intel/xeon_sp: Add common chip.h

Add a common chip.h which includes the configured Xeon specific
header file. Rename the Xeon specific header files. Common files
should call chip.h while Xeon silicon specific files call their
named header file. This should allow addition of new Xeon silicon.

This change prepares for additional common code changes.

Change-Id: I1c5e3dec3ee24328b1e987fdae856e9e77fe5499
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
---
M src/mainboard/ocp/deltalake/romstage.c
A src/soc/intel/xeon_sp/chip.h
M src/soc/intel/xeon_sp/cpx/acpi.c
M src/soc/intel/xeon_sp/cpx/cpu.c
R src/soc/intel/xeon_sp/cpx/cpx.h
M src/soc/intel/xeon_sp/cpx/romstage.c
M src/soc/intel/xeon_sp/cpx/soc_acpi.c
M src/soc/intel/xeon_sp/lpc.c
M src/soc/intel/xeon_sp/skx/acpi.c
M src/soc/intel/xeon_sp/skx/cpu.c
M src/soc/intel/xeon_sp/skx/romstage.c
R src/soc/intel/xeon_sp/skx/skx.h
M src/soc/intel/xeon_sp/skx/soc_acpi.c
13 files changed, 29 insertions(+), 10 deletions(-)