headers: remove sched.h from interrupt.h

After m68k's task_thread_info() doesn't refer to current,
it's possible to remove sched.h from interrupt.h and not break m68k!
Many thanks to Heiko Carstens for allowing this.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

drivers/net/wireless/iwmc3200wifi/cfg80211.c

@@ -23,6 +23,7 @@
 
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
+#include <linux/sched.h>
 #include <linux/etherdevice.h>
 #include <linux/wireless.h>
 #include <linux/ieee80211.h>

drivers/net/wireless/iwmc3200wifi/commands.c

@@ -40,6 +40,7 @@
 #include <linux/wireless.h>
 #include <linux/etherdevice.h>
 #include <linux/ieee80211.h>
+#include <linux/sched.h>
 
 #include "iwm.h"
 #include "bus.h"

drivers/net/wireless/iwmc3200wifi/main.c

@@ -38,6 +38,7 @@
 
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
+#include <linux/sched.h>
 #include <linux/ieee80211.h>
 #include <linux/wireless.h>
 

drivers/net/wireless/iwmc3200wifi/rx.c

@@ -38,6 +38,7 @@
 
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
+#include <linux/sched.h>
 #include <linux/etherdevice.h>
 #include <linux/wireless.h>
 #include <linux/ieee80211.h>