Renamed cpu/i386/reset.S to resetvec.S

Brings i386 in line with other CPUs with a reset vector and frees up reset.c
for CPU reset functions

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
diff --git a/Makefile b/Makefile
index b992521..b859bcb 100644
--- a/Makefile
+++ b/Makefile
@@ -197,7 +197,7 @@
 OBJS  = cpu/$(CPU)/start.o
 ifeq ($(CPU),i386)
 OBJS += cpu/$(CPU)/start16.o
-OBJS += cpu/$(CPU)/reset.o
+OBJS += cpu/$(CPU)/resetvec.o
 endif
 ifeq ($(CPU),ppc4xx)
 OBJS += cpu/$(CPU)/resetvec.o