hwrng: pic32 - remove unused defines

Remove some unused defines and fix the indentation.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/pic32-rng.c

@@ -20,14 +20,7 @@
 
 #define RNGCON		0x04
 #define TRNGEN		BIT(8)
-#define  PRNGEN		BIT(9)
-#define  PRNGCONT	BIT(10)
 #define TRNGMOD		BIT(11)
-#define  SEEDLOAD	BIT(12)
-#define RNGPOLY1	0x08
-#define RNGPOLY2	0x0C
-#define RNGNUMGEN1	0x10
-#define RNGNUMGEN2	0x14
 #define RNGSEED1	0x18
 #define RNGSEED2	0x1C
 #define RNGRCNT		0x20