x86, realmode: Move kernel/realmode.c to realmode/init.c

Keep all the realmode code together, including initialization (only
the rm/ subdirectory is actually built as real-mode code, anyway.)

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
diff --git a/arch/x86/realmode/Makefile b/arch/x86/realmode/Makefile
index a05b3ac..94f7fbe 100644
--- a/arch/x86/realmode/Makefile
+++ b/arch/x86/realmode/Makefile
@@ -9,6 +9,7 @@
 
 subdir- := rm
 
+obj-y += init.o
 obj-y += rmpiggy.o
 
 $(obj)/rmpiggy.o: $(obj)/rm/realmode.bin