net: mvpp2: Improve a size determination in two functions

Replace the specification of two data structures by pointer dereferences
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/mvpp2.c

@@ -2024,7 +2024,7 @@ static int mvpp2_prs_vlan_add(struct mvpp2 *priv, unsigned short tpid, int ai,
 			goto error;
 		}
 
-		memset(pe, 0 , sizeof(struct mvpp2_prs_entry));
+		memset(pe, 0, sizeof(*pe));
 		mvpp2_prs_tcam_lu_set(pe, MVPP2_PRS_LU_VLAN);
 		pe->index = tid;
 
@@ -2165,7 +2165,7 @@ static int mvpp2_prs_double_vlan_add(struct mvpp2 *priv, unsigned short tpid1,
 			goto error;
 		}
 
-		memset(pe, 0, sizeof(struct mvpp2_prs_entry));
+		memset(pe, 0, sizeof(*pe));
 		mvpp2_prs_tcam_lu_set(pe, MVPP2_PRS_LU_VLAN);
 		pe->index = tid;