omap24xx: rename reset file

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/cpu/arm1136/omap24xx/Makefile b/cpu/arm1136/omap24xx/Makefile
index 2a79d9b..48dc7e3 100644
--- a/cpu/arm1136/omap24xx/Makefile
+++ b/cpu/arm1136/omap24xx/Makefile
@@ -25,7 +25,7 @@
 
 LIB	= $(obj)lib$(SOC).a
 
-SOBJS	= start.o
+SOBJS	= reset.o
 
 COBJS	= timer.o