[ATM]: fix sparse gfp nocast warnings

Fix implicit nocast warnings in atm code:
net/atm/atm_misc.c:35:44: warning: implicit cast to nocast type
drivers/atm/fore200e.c:183:33: warning: implicit cast to nocast type

Also use kzalloc() instead of kmalloc().
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/atm/fore200e.c

@@ -178,13 +178,11 @@ fore200e_irq_itoa(int irq)
 
 
 static void*
-fore200e_kmalloc(int size, int flags)
+fore200e_kmalloc(int size, unsigned int __nocast flags)
 {
-    void* chunk = kmalloc(size, flags);
+    void *chunk = kzalloc(size, flags);
 
-    if (chunk)
-	memset(chunk, 0x00, size);
-    else
+    if (!chunk)
 	printk(FORE200E "kmalloc() failed, requested size = %d, flags = 0x%x\n",			size, flags);
     
     return chunk;

include/linux/atmdev.h

@@ -457,7 +457,7 @@ static inline void atm_dev_put(struct atm_dev *dev)
 
 int atm_charge(struct atm_vcc *vcc,int truesize);
 struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
-    int gfp_flags);
+    unsigned int __nocast gfp_flags);
 int atm_pcr_goal(struct atm_trafprm *tp);
 
 void vcc_release_async(struct atm_vcc *vcc, int reply);

net/atm/atm_misc.c

@@ -25,7 +25,7 @@ int atm_charge(struct atm_vcc *vcc,int truesize)
 
 
 struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
-    int gfp_flags)
+    unsigned int __nocast gfp_flags)
 {
 	struct sock *sk = sk_atm(vcc);
 	int guess = atm_guess_pdu2truesize(pdu_size);