firmware_loader: move struct builtin_fw to the only place used

Now that x86 doesn't abuse picking at internals to the firmware
loader move out the built-in firmware struct to its only user.

Reviewed-by: Borislav Petkov <[e-mail]>
Signed-off-by: Luis Chamberlain <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/base/firmware_loader/builtin/main.c

···
 /* Only if FW_LOADER=y */
 #ifdef CONFIG_FW_LOADER
 
+struct builtin_fw {
+	char *name;
+	void *data;
+	unsigned long size;
+};
+
 extern struct builtin_fw __start_builtin_fw[];
 extern struct builtin_fw __end_builtin_fw[];
 

include/linux/firmware.h

···
  * FW_LOADER=m
  */
 #ifdef CONFIG_FW_LOADER
-struct builtin_fw {
-	char *name;
-	void *data;
-	unsigned long size;
-};
-
 bool firmware_request_builtin(struct firmware *fw, const char *name);
 #else
 static inline bool firmware_request_builtin(struct firmware *fw,