m68k: rename CONFIG_MCFTMR to CFG_MCFTMR

This is not a Kconfig option so changing to _CFG.

Signed-off-by: Angelo Durgehello <angelo@kernel-space.org>
diff --git a/include/configs/M5275EVB.h b/include/configs/M5275EVB.h
index 607c5de..965327d 100644
--- a/include/configs/M5275EVB.h
+++ b/include/configs/M5275EVB.h
@@ -116,4 +116,6 @@
 #define CFG_SYS_CS1_CTRL		0x00001900
 #define CFG_SYS_CS1_MASK		0x00070001
 
+#define CFG_MCFTMR
+
 #endif	/* _M5275EVB_H */