cbtypes.h: Unify cbtypes.h used in AMD board's code

Remove all the repeated sections of code in cbtypes.h and place it
in a common location. Add include dir in vendor code's Makefile.

Change-Id: Ida92c2a7a88e9520b84b0dcbbf37cd5c9f63f798
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Reviewed-on: http://review.coreboot.org/912
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>

src/vendorcode/amd/cimx/rd890/Makefile.inc

@@ -32,6 +32,7 @@ CIMX_ROOT = $(src)/vendorcode/amd/cimx
 
 NB_CIMX_INC  = -I$(src)/mainboard/$(MAINBOARDDIR)
 NB_CIMX_INC  += -I$(src)/northbridge/amd/cimx/rd890
+NB_CIMX_INC  += -I$(src)/include/cpu/amd/common
 NB_CIMX_INC  += -I$(CIMX_ROOT)/rd890
 
 romstage-y += amdAcpiIvrs.c

src/vendorcode/amd/cimx/sb700/Makefile.inc

@@ -32,6 +32,7 @@ CIMX_ROOT = $(src)/vendorcode/amd/cimx
 
 SB_CIMX_INC  = -I$(src)/mainboard/$(MAINBOARDDIR)
 SB_CIMX_INC  += -I$(src)/southbridge/amd/cimx/sb700
+SB_CIMX_INC  += -I$(src)/include/cpu/amd/common
 SB_CIMX_INC  += -I$(CIMX_ROOT)/sb700
 
 romstage-y += ACPILIB.c

src/vendorcode/amd/cimx/sb800/Makefile.inc

@@ -22,6 +22,7 @@ CIMX_ROOT = $(src)/vendorcode/amd/cimx
 
 CIMX_INC  = -I$(src)/mainboard/$(MAINBOARDDIR)
 CIMX_INC  += -I$(src)/southbridge/amd/cimx/sb800
+CIMX_INC  += -I$(src)/include/cpu/amd/common
 CIMX_INC  += -I$(CIMX_ROOT)/sb800
 
 romstage-y += ACPILIB.c

src/vendorcode/amd/cimx/sb900/Makefile.inc

@@ -22,6 +22,7 @@ CIMX_ROOT = $(src)/vendorcode/amd/cimx
 
 CIMX_INC  = -I$(src)/mainboard/$(MAINBOARDDIR)
 CIMX_INC  += -I$(src)/southbridge/amd/cimx/sb900
+CIMX_INC  += -I$(src)/include/cpu/amd/common
 CIMX_INC  += -I$(CIMX_ROOT)/sb900
 
 romstage-y += AcpiLib.c