AHCI: Increase link timeout to 200ms

In 73545f75b6 "ahci: wait longer for link" I increased the
timeout to 40ms based on the observed behaviour of a WD disk on a
Cubietruck. Since then Karsten Merker and myself have both
observed timeouts with HGST disks (Karsten on Cubietruck, me on
Cubieboard2). Increasing the timeout to ~175ms fixes this, so go
to 200ms for a bit of headroom.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Cc: Karsten Merker <merker@debian.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>

drivers/block/ahci.c

@@ -41,7 +41,7 @@ u16 *ataid[AHCI_MAX_PORTS];
 #define WAIT_MS_SPINUP	20000
 #define WAIT_MS_DATAIO	5000
 #define WAIT_MS_FLUSH	5000
-#define WAIT_MS_LINKUP	40
+#define WAIT_MS_LINKUP	200
 
 static inline u32 ahci_port_base(u32 base, u32 port)
 {