Convert CONFIG_MCFTMR to Kconfig

This converts the following to Kconfig:
   CONFIG_MCFTMR

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/M53017EVB_defconfig b/configs/M53017EVB_defconfig
index 8283b52..52daf5d 100644
--- a/configs/M53017EVB_defconfig
+++ b/configs/M53017EVB_defconfig
@@ -5,6 +5,7 @@
 CONFIG_ENV_SECT_SIZE=0x8000
 CONFIG_DEFAULT_DEVICE_TREE="M53017EVB"
 CONFIG_TARGET_M53017EVB=y
+CONFIG_MCFTMR=y
 CONFIG_SYS_LOAD_ADDR=0x40010000
 CONFIG_BOOTDELAY=1
 CONFIG_USE_BOOTARGS=y