hw/sh4: Use the IEC binary prefix definitions

It eases code review, unit is explicit.

Patch generated using:

  $ git grep -E '(1024|2048|4096|8192|(<<|>>).?(10|20|30))' hw/ include/hw/

and modified manually.
Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180625124238.25339-29-f4bug@amsat.org>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

hw/sh4/r2d.c

@@ -24,6 +24,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/units.h"
 #include "qapi/error.h"
 #include "qemu-common.h"
 #include "cpu.h"
@@ -291,7 +292,7 @@ static void r2d_init(MachineState *machine)
     dinfo = drive_get(IF_PFLASH, 0, 0);
     pflash_cfi02_register(0x0, NULL, "r2d.flash", FLASH_SIZE,
                           dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
-                          (16 * 1024), FLASH_SIZE >> 16,
+                          16 * KiB, FLASH_SIZE >> 16,
                           1, 4, 0x0000, 0x0000, 0x0000, 0x0000,
                           0x555, 0x2aa, 0);