ae3xx: timer: Rename AE3XX to ATCPIT100

ATCPIT100 is Andestech timer IP which is embeded
in AE3XX and AE250 boards. So rename AE3XX to
ATCPIT100 will be more make sence.

Signed-off-by: rick <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/adp-ae3xx_defconfig b/configs/adp-ae3xx_defconfig
index a3a40bf..337cee1 100644
--- a/configs/adp-ae3xx_defconfig
+++ b/configs/adp-ae3xx_defconfig
@@ -35,4 +35,4 @@
 CONFIG_DM_SPI=y
 CONFIG_NDS_AE3XX_SPI=y
 CONFIG_TIMER=y
-CONFIG_AE3XX_TIMER=y
+CONFIG_ATCPIT100_TIMER=y