[POWERPC] qe_lib: fix few fluffy negligences

One is intoduced by me (of_node_put() absence) and another was
present already (not checking for NULL).

Found by Stephen Rothwell.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/sysdev/qe_lib/qe.c

@@ -66,7 +66,7 @@ phys_addr_t get_qe_base(void)
 {
 	struct device_node *qe;
 	unsigned int size;
-	const void *prop;
+	const u32 *prop;
 
 	if (qebase != -1)
 		return qebase;
@@ -79,6 +79,7 @@ phys_addr_t get_qe_base(void)
 	}
 
 	prop = of_get_property(qe, "reg", &size);
+	if (prop && size >= sizeof(*prop))
 		qebase = of_translate_address(qe, prop);
 	of_node_put(qe);
 
@@ -172,10 +173,9 @@ unsigned int get_brg_clk(void)
 	}
 
 	prop = of_get_property(qe, "brg-frequency", &size);
-	if (!prop || size != sizeof(*prop))
-		return brg_clk;
-
+	if (prop && size == sizeof(*prop))
 		brg_clk = *prop;
+
 	of_node_put(qe);
 
 	return brg_clk;