Sparc64: use firmware configuration device for command line storage

Avoid a ROM conflict.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

hw/sun4u.c

@@ -680,13 +680,13 @@ static void sun4uv_init(ram_addr_t RAM_size,
     fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, KERNEL_LOAD_ADDR);
     fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);
     if (kernel_cmdline) {
-        fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_CMDLINE, CMDLINE_ADDR);
-        pstrcpy_targphys("cmdline", CMDLINE_ADDR, TARGET_PAGE_SIZE, kernel_cmdline);
+        fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE,
+                       strlen(kernel_cmdline) + 1);
         fw_cfg_add_bytes(fw_cfg, FW_CFG_CMDLINE_DATA,
                          (uint8_t*)strdup(kernel_cmdline),
                          strlen(kernel_cmdline) + 1);
     } else {
-        fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_CMDLINE, 0);
+        fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE, 0);
     }
     fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, INITRD_LOAD_ADDR);
     fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);