Fix misspellings of "system", "controller", "interrupt" and "necessary".

Fix the various misspellings of "system", controller", "interrupt" and
"[un]necessary".

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/drivers/net/e100.c b/drivers/net/e100.c
index 64f35e2..3dbaec6 100644
--- a/drivers/net/e100.c
+++ b/drivers/net/e100.c
@@ -1324,7 +1324,7 @@
 		if (!--counter) break;
 	}
 
-	/* ack any interupts, something could have been set */
+	/* ack any interrupts, something could have been set */
 	iowrite8(~0, &nic->csr->scb.stat_ack);
 
 	/* if the command failed, or is not OK, notify and return */