you need the -DENABLE_MUSB_CONTROLLER define.. you should use the makefile directly instead of compiling it your own way.. now the makefile takes the target arch and the KDIR env var, so you should do something like :
make n900 KDIR=/path/to/the/kernel
there's also a 'n900-power' target which should take the EXTRAVERSION directly from the debian/changelog file.