efi: sysfb_efi: fix W=1 warnings when EFI is not set

A build with W=1 fails because there are code and data that are not
needed or used when CONFIG_EFI is not set. Move the "#ifdef CONFIG_EFI"
block to earlier in the source file so that the unused code/data are
not built.

drivers/firmware/efi/sysfb_efi.c:345:39: warning: ‘efifb_fwnode_ops’ defined but not used [-Wunused-const-variable=]
  345 | static const struct fwnode_operations efifb_fwnode_ops = {
      |                                       ^~~~~~~~~~~~~~~~
drivers/firmware/efi/sysfb_efi.c:238:35: warning: ‘efifb_dmi_swap_width_height’ defined but not used [-Wunused-const-variable=]
  238 | static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = {
      |                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/firmware/efi/sysfb_efi.c:188:35: warning: ‘efifb_dmi_system_table’ defined but not used [-Wunused-const-variable=]
  188 | static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
      |                                   ^~~~~~~~~~~~~~~~~~~~~~

Fixes: 15d27b1 ("efi: sysfb_efi: fix build when EFI is not set")
Signed-off-by: Randy Dunlap <[email protected]>
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Cc: David Rheinsberg <[email protected]>
Cc: Hans de Goede <[email protected]>
Cc: Javier Martinez Canillas <[email protected]>
Cc: Peter Jones <[email protected]>
Cc: Simona Vetter <[email protected]>
Cc: [email protected]
Cc: Ard Biesheuvel <[email protected]>
Cc: [email protected]
Reviewed-by: Thomas Zimmermann <[email protected]>
Reviewed-by: Javier Martinez Canillas <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>

Author: rddunlap

drivers/firmware/efi/sysfb_efi.c

@@ -91,6 +91,7 @@ void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
 		_ret_;						\
 	})
 
+#ifdef CONFIG_EFI
 static int __init efifb_set_system(const struct dmi_system_id *id)
 {
 	struct efifb_dmi_info *info = id->driver_data;
@@ -346,7 +347,6 @@ static const struct fwnode_operations efifb_fwnode_ops = {
 	.add_links = efifb_add_links,
 };
 
-#ifdef CONFIG_EFI
 static struct fwnode_handle efifb_fwnode;
 
 __init void sysfb_apply_efi_quirks(void)