x86: coding style fixes to arch/x86/math-emu/reg_constant

Before:
total: 6 errors, 1 warnings, 117 lines checked

After:
total: 0 errors, 1 warnings, 117 lines checked

paolo@paolo-desktop:~/linux.trees.git$ md5sum /tmp/reg_constant.o.*
780388a3056d58fb759efaf190d5d3d1  /tmp/reg_constant.o.after
780388a3056d58fb759efaf190d5d3d1  /tmp/reg_constant.o.before

paolo@paolo-desktop:~/linux.trees.git$ size /tmp/reg_constant.o.*
   text    data     bss     dec     hex filename
    457       0       0     457     1c9 /tmp/reg_constant.o.after
    457       0       0     457     1c9 /tmp/reg_constant.o.before

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>