dtc: Use stdint.h types throughout dtc

Currently, dtc defines Linux-like names for various fixed-size integer
types.  There's no good reason to do this; even Linux itself doesn't
use these names for externally visible things any more.  This patch
replaces these with the C99 standardized type names from stdint.h.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

dtc-parser.y

@@ -39,10 +39,10 @@ static unsigned long long eval_literal(const char *s, int base, int bits);
 	char *literal;
 	char *labelref;
 	unsigned int cbase;
-	u8 byte;
+	uint8_t byte;
 	struct data data;
 
-	u64 addr;
+	uint64_t addr;
 	cell_t cell;
 	struct property *prop;
 	struct property *proplist;