imx: use generic name ele(EdgeLockSecure Enclave)

Per NXP requirement, we rename all the NXP EdgeLock Secure Enclave
code including comment, folder and API name to ELE to align.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 52aed09..fd8805f 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -47,7 +47,7 @@
 obj-$(CONFIG_$(SPL_)I2C_EEPROM) += i2c_eeprom.o
 obj-$(CONFIG_IHS_FPGA) += ihs_fpga.o
 obj-$(CONFIG_IMX8) += imx8/
-obj-$(CONFIG_IMX_SENTINEL) += sentinel/
+obj-$(CONFIG_IMX_ELE) += imx_ele/
 obj-$(CONFIG_LED_STATUS) += status_led.o
 obj-$(CONFIG_LED_STATUS_GPIO) += gpio_led.o
 obj-$(CONFIG_MPC83XX_SERDES) += mpc83xx_serdes.o