rng: eliminate common.h include from RNG drivers

Usage of common.h is deprecated.

* Remove common.h from RNG drivers.
* Sort includes.
* Add time.h to sandbox driver.
* Add linux/types.h to rng.h to provide size_t.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/drivers/rng/msm_rng.c b/drivers/rng/msm_rng.c
index 29e7354..658c153 100644
--- a/drivers/rng/msm_rng.c
+++ b/drivers/rng/msm_rng.c
@@ -9,12 +9,11 @@
  * Based on Linux driver
  */
 
-#include <asm/io.h>
 #include <clk.h>
-#include <common.h>
 #include <dm.h>
-#include <linux/bitops.h>
 #include <rng.h>
+#include <asm/io.h>
+#include <linux/bitops.h>
 
 /* Device specific register offsets */
 #define PRNG_DATA_OUT		0x0000