ethernet: sis900: use sizeof(*pointer) instead of sizeof(type)

It is preferred to use sizeof(*pointer) instead of sizeof(type)
due to the type of the variable can change and one needs not
change the former (unlike the latter).

At the same time remove some unnecessary initializations and
refactor a bit to make the code clearer.

This patch has no effect on runtime behavior.

Signed-off-by: Erick Archer <[email protected]>
Signed-off-by: NipaLocal <nipa@local>

drivers/net/ethernet/sis/sis900.c

@@ -614,11 +614,10 @@ static int sis900_mii_probe(struct net_device *net_dev)
 
 	/* search for total of 32 possible mii phy addresses */
 	for (phy_addr = 0; phy_addr < 32; phy_addr++) {
-		struct mii_phy * mii_phy = NULL;
+		struct mii_phy *mii_phy;
 		u16 mii_status;
 		int i;
 
-		mii_phy = NULL;
 		for(i = 0; i < 2; i++)
 			mii_status = mdio_read(net_dev, phy_addr, MII_STATUS);
 
@@ -630,7 +629,8 @@ static int sis900_mii_probe(struct net_device *net_dev)
 			continue;
 		}
 
-		if ((mii_phy = kmalloc(sizeof(struct mii_phy), GFP_KERNEL)) == NULL) {
+		mii_phy = kmalloc(sizeof(*mii_phy), GFP_KERNEL);
+		if (!mii_phy) {
 			mii_phy = sis_priv->first_mii;
 			while (mii_phy) {
 				struct mii_phy *phy;