scripts/spelling.txt: add "fimware" misspelling

A few instances of "fimware" instead of "firmware" were found.  Fix
these and add it to the spelling.txt file.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/scripts/spelling.txt b/scripts/spelling.txt
index 946caf3..fa79c6d 100644
--- a/scripts/spelling.txt
+++ b/scripts/spelling.txt
@@ -428,6 +428,7 @@
 fetaure||feature
 fetaures||features
 fileystem||filesystem
+fimware||firmware
 finanize||finalize
 findn||find
 finilizes||finalizes