Here!
1. Edit your "dm9601.c" and change '#include <linux/config.h>' to '#include <linux/configfs.h>'
2. If necessary change the 'CFLAGS' TO 'EXTRA_CFLAGS' in the Makefile.
3. and then try with 'make'!
I suggest you use fedora if you are doing RHCE and install Redhat on virtual machine to pass the exam.