uio_pci_dma.c: support for kernels >4.1

Author: rndhro

patches/linux_uio/uio_pci_dma.c

@@ -51,7 +51,7 @@
 #include <linux/sched.h>
 #include <linux/smp.h>
 #include <asm/cacheflush.h>
-
+#include <linux/vmalloc.h>
 
 
 #pragma GCC diagnostic pop