remove redundant lines from locore.S

[Björn König]

Hello,

there are some lines in sys/arm/arm/locore.S that are needless:

170:        ldr     pc, .Lvirt_done
171:
172: virt_done:

214: .Lvirt_done:
215:        .word   virt_done

Furthermore these lines seem to be a problem for my AT91RM9200. It's not
clear to me why the execution stops at line 170, but if I remove them it
goes on. I use gcc 4.2 with latest HEAD and COPTFLAGS=-O -pipe
-fno-strict-aliasing.

Regards
Björn