[PATCH] ipw2200: use jiffies_to_msec() wherever possible

This substitutes Linux jiffies_to_msec() wherever there is a
computation for determining milliseconds from jiffies,
following lead from ieee80211 code. And it does a little cleanup.
"it's" == "it is" ... "its" == possessive "it". Indulge me. ;-)

Signed-off-by: Cahill, Ben M <ben.m.cahill@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ipw2200.h

@@ -46,6 +46,7 @@
 #include <linux/firmware.h>
 #include <linux/wireless.h>
 #include <linux/dma-mapping.h>
+#include <linux/jiffies.h>
 #include <asm/io.h>
 
 #include <net/ieee80211.h>