x86: coding style fixes to arch/x86/lib/usercopy_32.c

Before:
 total: 63 errors, 2 warnings, 878 lines checked
After:
 total: 0 errors, 2 warnings, 878 lines checked

Compile tested, no change in the binary output:

text    data     bss     dec     hex filename
3231       0       0    3231     c9f usercopy_32.o.after
3231       0       0    3231     c9f usercopy_32.o.before

md5sum:
9f9a3eb43970359ae7cecfd1c9e7cf42  usercopy_32.o.after
9f9a3eb43970359ae7cecfd1c9e7cf42  usercopy_32.o.before

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