sm501fb: fix regression with uninitalized fb_info->mm_lock mutex

Remove call to the fb_set_par() before the register_framebuffer().

This fixes a problem with uninitialized the fb_info->mm_lock mutex
introduced by the commit 537a1bf059f " fbdev: add mutex for fb_mmap
locking"

Signed-off-by: Krzysztof Helt <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/video/sm501fb.c

···
 	if (ret)
 		dev_err(info->dev, "check_var() failed on initial setup?\n");
 
-	/* ensure we've activated our new configuration */
-	(fb->fbops->fb_set_par)(fb);
-
 	return 0;
 }