bcmdhd: Enable Ad-Hoc (IBSS) mode

Enable Ad-Hoc (IBSS) mode for bcmdhd. We basically just need to set the
interface flag and avoid some P2P specific settings while scanning.

Also add the "station get" command for IBSS mode.

Change-Id: Ie6f0fa77b55d92a7c22cbda72bad200cbfaede04
Signed-off-by: Bruno Randolf <br1@einfach.org>
fix build break with linaro 4.7.3 toolchain

Change-Id: Ideda40cadcff4bad73e741ffd17b130d83c952ba
Compiler flags

Change-Id: Ia201e4c43d93a811ab84cf926acb0f76e632121b
ccache

Change-Id: I5d93c2f0d08ce6b671752ec27a39f0c33918973e
add -pipe flag

Change-Id: I9eab875c63f84c5f1faddd7dfa62d78747a9ecae