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/stmark2_defconfig b/configs/stmark2_defconfig
index 6ccd667..17007a0 100644
--- a/configs/stmark2_defconfig
+++ b/configs/stmark2_defconfig
@@ -6,6 +6,7 @@
 CONFIG_ENV_SECT_SIZE=0x10000
 CONFIG_DEFAULT_DEVICE_TREE="stmark2"
 CONFIG_TARGET_STMARK2=y
+CONFIG_MCFTMR=y
 CONFIG_SYS_LOAD_ADDR=0x40010000
 CONFIG_TIMESTAMP=y
 CONFIG_SYS_EXTRA_OPTIONS="CF_SBF,SYS_SERIAL_BOOT,SYS_INPUT_CLKSRC=30000000"