2.5.33 PNPBIOS does not compile

[Nicholas Miell]

pnpbios_core.c: In function `call_pnp_bios':
pnpbios_core.c:167: invalid lvalue in unary `&'
pnpbios_core.c:167: invalid lvalue in unary `&'
pnpbios_core.c:169: invalid lvalue in unary `&'
pnpbios_core.c:169: invalid lvalue in unary `&'
pnpbios_core.c: In function `pnpbios_init':
pnpbios_core.c:1276: invalid lvalue in unary `&'
pnpbios_core.c:1276: invalid lvalue in unary `&'
pnpbios_core.c:1277: invalid lvalue in unary `&'
pnpbios_core.c:1277: invalid lvalue in unary `&'
pnpbios_core.c:1278: invalid lvalue in unary `&'
pnpbios_core.c:1278: invalid lvalue in unary `&'
make[2]: *** [pnpbios_core.o] Error 1
make[2]: Target `first_rule' not remade because of errors.
make[1]: *** [pnp] Error 2

... which is the result of the expansion of the Q_SET_SEL and Q2_SET_SEL
macros. 

My guess is that changing the macros so that they use set_limit instead
of _set_limit is what broke things, but I don't understand any of this
x86 segmentation voodoo, so I'm not touching it.