x86: coding style fixes to arch/x86/kernel/cpu/mcheck/p4.c

Before:
total: 16 errors, 34 warnings, 257 lines checked

After:
total: 0 errors, 2 warnings, 257 lines checked

No changes in the compiled code:

paolo@paolo-desktop:~/linux.trees.git$ size /tmp/p4*
   text    data     bss     dec     hex filename
   2644       4       4    2652     a5c /tmp/p4.o.after
   2644       4       4    2652     a5c /tmp/p4.o.before

paolo@paolo-desktop:~/linux.trees.git$ md5sum /tmp/p4*
13f1b21c4246b31a28aaff38184586ca  /tmp/p4.o.after
13f1b21c4246b31a28aaff38184586ca  /tmp/p4.o.before

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