fusion3-common: Remove old flags and organize

PS3:
* Remove deprecated krait flags
* Remove duplicated BOARD_HAVE_BLUETOOTH flag (present in qcom-common)
* Organize all the things

PS6:
* Follow Giulio's comment
* Further cleanup

PS9:
* Reorganize, alphabetize (inspired by oppo devices)
* Remove deprecated recovery flags
* Remove maxcpus cmdline param

Change-Id: I1869faf3a1383ed4abea5d0d0ab59fb7d80e9403