powerpc/kvm: Fix non-modular build

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kvm/timing.c

@@ -23,6 +23,7 @@
 #include <linux/seq_file.h>
 #include <linux/debugfs.h>
 #include <linux/uaccess.h>
+#include <linux/module.h>
 
 #include <asm/time.h>
 #include <asm-generic/div64.h>