r8169: fix broken register writes

This is quite similar to b39fe41f481d20c201012e4483e76c203802dda7
though said registers are not even documented as 64-bit registers
- as opposed to the initial TxDescStartAddress ones - but as single
bytes which must be combined into 32 bits at the MMIO read/write
level before being merged into a 64 bit logical entity.

Credits go to Ben Hutchings <[e-mail]> for the MAR
registers (aka "multicast is broken for ages on ARM) and to
Timo Teräs <[e-mail]> for the MAC registers.

Signed-off-by: Francois Romieu <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/r8169.c

···
 	spin_lock_irq(&tp->lock);
 
 	RTL_W8(Cfg9346, Cfg9346_Unlock);
-	RTL_W32(MAC0, low);
 	RTL_W32(MAC4, high);
+	RTL_W32(MAC0, low);
 	RTL_W8(Cfg9346, Cfg9346_Lock);
 
 	spin_unlock_irq(&tp->lock);
···
 		mc_filter[1] = swab32(data);
 	}
 
-	RTL_W32(MAR0 + 0, mc_filter[0]);
 	RTL_W32(MAR0 + 4, mc_filter[1]);
+	RTL_W32(MAR0 + 0, mc_filter[0]);
 
 	RTL_W32(RxConfig, tmp);