scripts/spelling.txt: add a bunch more spelling mistakes

scripts/spelling.txt: add a bunch more spelling mistakes

Here are some of the more spelling mistakes and typos that I've found
while fixing up spelling mistakes in kernel error message text over the
past several weeks.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Colin Ian King <[email protected]>
Acked-by: Kees Cook <[email protected]>
Cc: Joe Perches <[email protected]>
Cc: Stephen Boyd <[email protected]>
Cc: Ross Zwisler <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>