Simply make r a function of the parameter "temp". For example (for convenience I put the inductor inside an inline subckt - didn't pass the temperature dependent parameters for inductance to avoid it getting cluttered in this example):
Code:inline subckt myind (n1 n2)
parameters r=0 l=0 rtc1=0 rtc2=0
myind (n1 n2) inductor l=l r=r*(1+rtc1*(temp-tnom)+rtc2*((temp-tnom)**2))
ends myind
l1 (ind 0) myind l=1u r=10 rtc1=0.1
Regards,
Andrew.