Move OS-specific driver configuration to grub_util_fd_open. This

moves OS-dependent parts from kern/emu/hostdisk.c to
	grub-core/osdep/*/hostdisk.c.

grub-core/osdep/sun/hostdisk.c

@@ -67,11 +67,6 @@ grub_util_get_fd_size_os (grub_util_fd_t fd, const char *name, unsigned *log_sec
   return minfo.dki_capacity << log_sector_size;
 }
 
-void
-grub_hostdisk_configure_device_driver (grub_util_fd_t fd __attribute__ ((unused)))
-{
-}
-
 void
 grub_hostdisk_flush_initial_buffer (const char *os_dev __attribute__ ((unused)))
 {