hwrng: core - Move hwrng miscdev minor number to include/linux/miscdevice.h

This patch move the define for hwrng's miscdev minor number to
include/linux/miscdevice.h.
It's better that all minor number are in the same place.
Rename it to HWRNG_MINOR (from RNG_MISCDEV_MINOR) in he process since
no other miscdev define have MISCDEV in their name.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/core.c

@@ -26,7 +26,6 @@
 
 #define RNG_MODULE_NAME		"hw_random"
 #define PFX			RNG_MODULE_NAME ": "
-#define RNG_MISCDEV_MINOR	183 /* official */
 
 static struct hwrng *current_rng;
 static struct task_struct *hwrng_fill;
@@ -285,7 +284,7 @@ static const struct file_operations rng_chrdev_ops = {
 static const struct attribute_group *rng_dev_groups[];
 
 static struct miscdevice rng_miscdev = {
-	.minor		= RNG_MISCDEV_MINOR,
+	.minor		= HWRNG_MINOR,
 	.name		= RNG_MODULE_NAME,
 	.nodename	= "hwrng",
 	.fops		= &rng_chrdev_ops,

include/linux/miscdevice.h

@@ -31,6 +31,7 @@
 #define SGI_MMTIMER		153
 #define STORE_QUEUE_MINOR	155	/* unused */
 #define I2O_MINOR		166
+#define HWRNG_MINOR		183
 #define MICROCODE_MINOR		184
 #define IRNET_MINOR		187
 #define VFIO_MINOR		196