scripts/spelling.txt: add more spellings to spelling.txt

Some of the more common spelling mistakes and typos that I've found while
fixing up spelling mistakes in the kernel in the past year.

Link: https://lkml.kernel.org/r/20221108110712.114611-1-colin.i.king@gmail.com


Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>