CIMx: Allow #define LEGACY_FREE overrides

For legacy free AMD systems, the #define LEGACY_FREE cannot
currently be overridden.  This patch allows the platform_cfg.h
to override that.  (I know we want to get away from that, but
for now...)

Also allow BIOS_SIZE to be overridden on SB700 cimx based
platforms.

Change-Id: I570115248bcbc686062bfb66acb56208240b847a
Signed-off-by: Martin L Roth <martin@se-eng.com>
Reviewed-on: http://review.coreboot.org/1018
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>

src/vendorcode/amd/cimx/sb700/OEM.h

@@ -29,8 +29,12 @@
 #ifndef _AMD_SB_CIMx_OEM_H_
 #define _AMD_SB_CIMx_OEM_H_
 
+#ifndef BIOS_SIZE
 	#define BIOS_SIZE					0x04	//04 - 1MB
+#endif
+#ifndef LEGACY_FREE
 	#define	LEGACY_FREE					0x00
+#endif
 
 /**
  * PCIEX_BASE_ADDRESS - Define PCIE base address

src/vendorcode/amd/cimx/sb800/OEM.h

@@ -33,7 +33,9 @@
 #ifndef BIOS_SIZE
   #define BIOS_SIZE                      0x04   //04 - 1MB
 #endif
+#ifndef LEGACY_FREE
 	#define LEGACY_FREE                    0x00
+#endif
 //#define ACPI_SLEEP_TRAP                0x01
 //#define SPREAD_SPECTRUM_EPROM_LOAD     0x01
 

src/vendorcode/amd/cimx/sb900/Oem.h

@@ -30,7 +30,9 @@
 #ifndef BIOS_SIZE
   #define BIOS_SIZE                      0x04   //04 - 1MB
 #endif
+#ifndef LEGACY_FREE
 	#define LEGACY_FREE                    0x00
+#endif
 #define ACPI_SLEEP_TRAP                0x01
 //#define SPREAD_SPECTRUM_EPROM_LOAD     0x01