tree-wide: fix a very frequent spelling mistake

something-bility is spelled as something-blity
so a grep for 'blit' would find these lines

this is so trivial that I didn't split it by subsystem / copy
additional maintainers - all changes are to comments
The only purpose is to get fewer false positives when grepping
around the kernel sources.

Signed-off-by: Dirk Hohndel <hohndel@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

arch/powerpc/kernel/vdso.c

@@ -721,7 +721,7 @@ static int __init vdso_init(void)
 
 #ifdef CONFIG_PPC64
 	/*
-	 * Fill up the "systemcfg" stuff for backward compatiblity
+	 * Fill up the "systemcfg" stuff for backward compatibility
 	 */
 	strcpy((char *)vdso_data->eye_catcher, "SYSTEMCFG:PPC64");
 	vdso_data->version.major = SYSTEMCFG_MAJOR;