pmic: tps65090: correct checking i2c bus

The function tps65090_init checks the i2c bus of p->bus. However
the pointer p is not intialiased at this point. Check the local
variable bus instead.

cc: Tom Wai-Hong Tam <waihong@chromium.org>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Acked-by: Simon Glass <sjg@chromium.org>

drivers/power/pmic/pmic_tps65090.c

@@ -285,7 +285,7 @@ int tps65090_init(void)
 	}
 
 	bus = i2c_get_bus_num_fdt(parent);
-	if (p->bus < 0) {
+	if (bus < 0) {
 		debug("%s: Cannot find I2C bus\n", __func__);
 		return -ENOENT;
 	}