sandbox: Find keyboard driver using driver model

The cros-ec keyboard is always a child of the cros-ec node. Rather than
searching the device tree, looking at the children. Remove the compat string
which is now unused.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/misc/cros_ec_sandbox.c

@@ -517,6 +517,7 @@ int cros_ec_probe(struct udevice *dev)
 	struct ec_state *ec = dev->priv;
 	struct cros_ec_dev *cdev = dev->uclass_priv;
 	const void *blob = gd->fdt_blob;
+	struct udevice *keyb_dev;
 	int node;
 	int err;
 
@@ -525,7 +526,15 @@ int cros_ec_probe(struct udevice *dev)
 	if (err)
 		return err;
 
-	node = fdtdec_next_compatible(blob, 0, COMPAT_GOOGLE_CROS_EC_KEYB);
+	node = -1;
+	for (device_find_first_child(dev, &keyb_dev);
+	     keyb_dev;
+	     device_find_next_child(&keyb_dev)) {
+		if (device_get_uclass_id(keyb_dev) == UCLASS_KEYBOARD) {
+			node = keyb_dev->of_offset;
+			break;
+		}
+	}
 	if (node < 0) {
 		debug("%s: No cros_ec keyboard found\n", __func__);
 	} else if (keyscan_read_fdt_matrix(ec, blob, node)) {

include/fdtdec.h

@@ -134,7 +134,6 @@ enum fdt_compat_id {
 	COMPAT_SAMSUNG_S3C2440_I2C,	/* Exynos I2C Controller */
 	COMPAT_SAMSUNG_EXYNOS5_SOUND,	/* Exynos Sound */
 	COMPAT_WOLFSON_WM8994_CODEC,	/* Wolfson WM8994 Sound Codec */
-	COMPAT_GOOGLE_CROS_EC_KEYB,	/* Google CROS_EC Keyboard */
 	COMPAT_SAMSUNG_EXYNOS_USB_PHY,	/* Exynos phy controller for usb2.0 */
 	COMPAT_SAMSUNG_EXYNOS5_USB3_PHY,/* Exynos phy controller for usb3.0 */
 	COMPAT_SAMSUNG_EXYNOS_TMU,	/* Exynos TMU */

lib/fdtdec.c

@@ -44,7 +44,6 @@ static const char * const compat_names[COMPAT_COUNT] = {
 	COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
 	COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
 	COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
-	COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
 	COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
 	COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
 	COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),