Blackfin: fix sparse warnings in copy_to/from_user

Fix argument types for copy_to_user.
Fix following sparse warnings:
arch/blackfin/include/asm/uaccess.h:198:14: warning: incorrect type
in argument 2 (different address spaces)
arch/blackfin/include/asm/uaccess.h:198:14: expected void const *s
arch/blackfin/include/asm/uaccess.h:198:14: got void const
[noderef] <asn:1>*from
arch/blackfin/include/asm/uaccess.h:208:14: warning: incorrect type
in argument 2 (different address spaces)
arch/blackfin/include/asm/uaccess.h:208:14: expected void const *s
arch/blackfin/include/asm/uaccess.h:208:14: got void const
[noderef] <asn:1>*from

Signed-off-by: Mikhail Gruzdev <[e-mail]>
Signed-off-by: Mike Frysinger <[e-mail]>

arch/blackfin/include/asm/uaccess.h

···
 copy_from_user(void *to, const void __user *from, unsigned long n)
 {
 	if (access_ok(VERIFY_READ, from, n))
-		memcpy(to, from, n);
+		memcpy(to, (const void __force *)from, n);
 	else
 		return n;
 	return 0;
 }
 
 static inline unsigned long __must_check
-copy_to_user(void *to, const void __user *from, unsigned long n)
+copy_to_user(void __user *to, const void *from, unsigned long n)
 {
 	if (access_ok(VERIFY_WRITE, to, n))
-		memcpy(to, from, n);
+		memcpy((void __force *)to, from, n);
 	else
 		return n;
 	return 0;