GenWQE: Accidently casting to u32 where u64 is required

Fix a casting to u32 where u64 would be appropriate.
The bad casting made the driver unusable.

Signed-off-by: Frank Haverkamp <haver@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c
index 663157b..6b1a6ef 100644
--- a/drivers/misc/genwqe/card_utils.c
+++ b/drivers/misc/genwqe/card_utils.c
@@ -59,7 +59,7 @@
 	if (cd->mmio == NULL)
 		return -EIO;
 
-	__raw_writeq((__force u32)cpu_to_be64(val), cd->mmio + byte_offs);
+	__raw_writeq((__force u64)cpu_to_be64(val), cd->mmio + byte_offs);
 	return 0;
 }