Convert CONFIG_DS4510 to Kconfig

This converts the following to Kconfig:
   CONFIG_DS4510

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/configs/xpedite517x_defconfig b/configs/xpedite517x_defconfig
index 909efb1..69fd8fa 100644
--- a/configs/xpedite517x_defconfig
+++ b/configs/xpedite517x_defconfig
@@ -15,6 +15,7 @@
 CONFIG_CMD_PING=y
 CONFIG_CMD_SNTP=y
 CONFIG_CMD_DATE=y
+CONFIG_DS4510=y
 # CONFIG_MMC is not set
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_SYS_NS16550=y
diff --git a/configs/xpedite537x_defconfig b/configs/xpedite537x_defconfig
index 41dee5d..641ef8f 100644
--- a/configs/xpedite537x_defconfig
+++ b/configs/xpedite537x_defconfig
@@ -16,6 +16,7 @@
 CONFIG_CMD_SNTP=y
 CONFIG_CMD_DATE=y
 CONFIG_SYS_FSL_DDR2=y
+CONFIG_DS4510=y
 # CONFIG_MMC is not set
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_SYS_NS16550=y