alpha: Convert BUG() to use unreachable()
alpha: Convert BUG() to use unreachable()

Use the new unreachable() macro instead of for(;;);

Signed-off-by: David Daney <0662de36cfb0706ed279bff52abef14720945acc@caviumnetworks.com>
CC: Richard Henderson <aea4fd857e97ee7d33f60175ba9388a955b9d916@twiddle.net>
CC: Ivan Kokshaysky <ec437ab60af367f0fec0f6a3cd47f9cbad7b487f@jurassic.park.msu.ru>
CC: 92b16e4f8d3bce14a77cfee1aa13cdb592ef5039@vger.kernel.org
Signed-off-by: Matt Turner <789b315743a28dd066a4ba1459c35951c291d8a6@gmail.com>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs