typo fixes

Most of these fixes were already submitted for old kernel versions, and were
approved, but for some reason they never made it into the releases.

Because this is a consolidation of a couple old missed patches, it touches both
Kconfigs and documentation texts.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 83d52c8..fd9e840 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -855,7 +855,7 @@
 	depends on BFIN_MAC && BF537
 	default y
 	help
-	  To get maximum network performace, you should use L1 memory as rx/tx buffers.
+	  To get maximum network performance, you should use L1 memory as rx/tx buffers.
 	  Say N here if you want to reserve L1 memory for other uses.
 
 config BFIN_TX_DESC_NUM