hp100: references __init code that should be marked as __devinit;

Error: ./drivers/net/hp100.o .text refers to 0000000000000f7f R_X86_64_PC32     .init.text+0x00000000000000b8
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>