Added all avr-libc _P and _PF variant macros
Added all avr-libc _P and _PF variant macros

chipKIT32/chipkit-core,EmbeddedMan/chipKIT-core,adamwolf/chipKIT-core,chipKIT32/chipkit-core,adamwolf/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core,adamwolf/chipKIT-core,chipKIT32/chipkit-core,majenkotech/chipKIT-core,EmbeddedMan/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core,EmbeddedMan/chipKIT-core,EmbeddedMan/chipKIT-core,chipKIT32/chipkit-core,chipKIT32/chipkit-core,EmbeddedMan/chipKIT-core,majenkotech/chipKIT-core,majenkotech/chipKIT-core,adamwolf/chipKIT-core,EmbeddedMan/chipKIT-core,EmbeddedMan/chipKIT-core,majenkotech/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core