b43: fix comment typo reqest -> request

Recent trivial fix corrected 'occured', but left 'reqest'.
codespell needs another dictionary entry.

cc: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/net/wireless/b43/b43.h

@@ -648,8 +648,8 @@ struct b43_request_fw_context {
 	char errors[B43_NR_FWTYPES][128];
 	/* Temporary buffer for storing the firmware name. */
 	char fwname[64];
-	/* A fatal error occurred while requesting. Firmware reqest
-	 * can not continue, as any other reqest will also fail. */
+	/* A fatal error occurred while requesting. Firmware request
+	 * can not continue, as any other request will also fail. */
 	int fatal_failure;
 };