Staging: w35und: convert code to use ETH_ALEN

As suggested by Harvey Harrison, convert driver to use ETH_ALEN and kill a
private macro from common.h that is used for the same thing.

Acked-by: Harvey Harrison <harvey.harrison@gmail.com>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/winbond/wb35reg.c b/drivers/staging/winbond/wb35reg.c
index c74b3fd..87c2c43 100644
--- a/drivers/staging/winbond/wb35reg.c
+++ b/drivers/staging/winbond/wb35reg.c
@@ -599,7 +599,7 @@
 	Wb35Reg_ReadSync( pHwData, 0x03b4, &Region_ScanInterval );
 
 	// Update Ethernet address
-	memcpy( pHwData->CurrentMacAddress, pHwData->PermanentMacAddress, ETH_LENGTH_OF_ADDRESS );
+	memcpy( pHwData->CurrentMacAddress, pHwData->PermanentMacAddress, ETH_ALEN );
 
 	// Update software variable
 	pHwData->SoftwareSet = (u16)(SoftwareSet & 0xffff);