musicpal: convert to ram_addr_t

Index: qemu/hw/musicpal.c
===================================================================
@@ -1380,7 +1380,7 @@ static struct arm_boot_info musicpal_bin
     .board_id = 0x20e,
 };
 
-static void musicpal_init(int ram_size, int vga_ram_size,
+static void musicpal_init(ram_addr_t ram_size, int vga_ram_size,
                const char *boot_device, DisplayState *ds,
                const char *kernel_filename, const char *kernel_cmdline,
                const char *initrd_filename, const char *cpu_model)