fix build error with some flavours of gcc 2.95.3

fix build error with some flavours of gcc 2.95.3

This patches include/asm/processor.h
Sometime between 2.4.29 and 2.4.36.2 spaces were deleted between colons
which causes compiler gcc 2.95.3 to fail to parse the header
when compiling applications which include it.
Adding back the spaces solves the problem on gcc 2.95.3.
gcc 4.1.1 also compiles the kernel OK with this patch."

Signed-off-by: Willy Tarreau <w@1wt.eu>