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: Philippe Mathieu-Daudé <f4bug@amsat.org>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
---
 hw/xtensa/xtfpga.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/xtensa/xtfpga.c b/hw/xtensa/xtfpga.c
index 70686a2eb1..922417af15 100644
--- a/hw/xtensa/xtfpga.c
+++ b/hw/xtensa/xtfpga.c
@@ -230,7 +230,7 @@ static void xtfpga_init(const XtfpgaBoardDesc *board, MachineState *machine)
     const char *kernel_cmdline = qemu_opt_get(machine_opts, "append");
     const char *dtb_filename = qemu_opt_get(machine_opts, "dtb");
     const char *initrd_filename = qemu_opt_get(machine_opts, "initrd");
-    const unsigned system_io_size = 224 * 1024 * 1024;
+    const unsigned system_io_size = 224 * M_BYTE;
     int n;
 
     for (n = 0; n < smp_cpus; n++) {
-- 
2.16.2