DM: split sw_load.c to sw_load.c and sw_load_direct.c

The common loader code is put to sw_load_common.c
The loader code for directly kernel loading is put to sw_load_bzimage.c
The further change for SBL will be put to sw_load_sbl.c

Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>

devicemodel/core/main.c

@@ -61,12 +61,10 @@
 #include "smbiostbl.h"
 #include "rtc.h"
 #include "version.h"
+#include "sw_load.h"
 
 #define GUEST_NIO_PORT		0x488	/* guest upcalls via i/o port */
 
-#define MB		(1024UL * 1024)
-#define GB		(1024UL * MB)
-
 typedef int (*vmexit_handler_t)(struct vmctx *,
 		struct vhm_request *, int *vcpu);