kcov: fix spelling typos in comments

Fix the typo of 'suport' in kcov.h

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Rong Tao <[e-mail]>
Reviewed-by: Dmitry Vyukov <[e-mail]>
Cc: Andrey Konovalov <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

include/linux/kcov.h

···
 /*
  * The softirq flavor of kcov_remote_*() functions is introduced as a temporary
  * work around for kcov's lack of nested remote coverage sections support in
- * task context. Adding suport for nested sections is tracked in:
+ * task context. Adding support for nested sections is tracked in:
  * https://bugzilla.kernel.org/show_bug.cgi?id=210337
  */