fbdev: macmodes: add missing MODULE_DESCRIPTION() macro

With ARCH=x86, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/video/fbdev/macmodes.o

Add the missing invocation of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Helge Deller <deller@gmx.de>

drivers/video/fbdev/macmodes.c

@@ -411,4 +411,5 @@ int mac_find_mode(struct fb_var_screeninfo *var, struct fb_info *info,
 }
 EXPORT_SYMBOL(mac_find_mode);
 
+MODULE_DESCRIPTION("MacOS video mode library");
 MODULE_LICENSE("GPL");