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 four months.

Link: https://lkml.kernel.org/r/20220216152343.105546-1-colin.i.king@gmail.com


Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>