Enclose some SUN4-specific code within preprocessor directives, this lets SUN4C kernel compile again.
Enclose some SUN4-specific code within preprocessor directives, this lets SUN4C
kernel compile again.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars