m32r/uaccess: fix sparse errors

virtio wants to read bitwise types from userspace using get_user.  At the
moment this triggers sparse errors, since the value is passed through an
integer.

Fix that up using __force.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

arch/m32r/include/asm/uaccess.h

@@ -218,7 +218,7 @@ extern int fixup_exception(struct pt_regs *regs);
 	unsigned long __gu_val;						\
 	might_fault();							\
 	__get_user_size(__gu_val,(ptr),(size),__gu_err);		\
-	(x) = (__typeof__(*(ptr)))__gu_val;				\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
 	__gu_err;							\
 })
 
@@ -230,7 +230,7 @@ extern int fixup_exception(struct pt_regs *regs);
 	might_fault();							\
 	if (access_ok(VERIFY_READ,__gu_addr,size))			\
 		__get_user_size(__gu_val,__gu_addr,(size),__gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;				\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
 	__gu_err;							\
 })