Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/net/ucc_geth.h b/drivers/net/ucc_geth.h
index 055b87a..d12fcad 100644
--- a/drivers/net/ucc_geth.h
+++ b/drivers/net/ucc_geth.h
@@ -80,7 +80,7 @@
 				   frames) received that were between 128
 				   (Including FCS length==4) and 255 octets */
 	u32 txok;		/* Total number of octets residing in frames
-				   that where involved in successfull
+				   that where involved in successful
 				   transmission */
 	u16 txcf;		/* Total number of PAUSE control frames
 				   transmitted by this MAC */
@@ -759,7 +759,7 @@
 				   frames) received that were between 128
 				   (Including FCS length==4) and 255 octets */
 	u32 txok;		/* Total number of octets residing in frames
-				   that where involved in successfull
+				   that where involved in successful
 				   transmission */
 	u16 txcf;		/* Total number of PAUSE control frames
 				   transmitted by this MAC */