PCMCIA/CF power.

[Oleg Gusev]

FYI,

 on CF insert the GPB0 is set, on deinsert - cleared.
 With PCMCIA (i have only 3.3V) it is more tricky. 
 No PCMCIA -> GPA=9d, PCMCIA inserted ->GPA=d9
 GPA sequence
 on  deinsert:
                  f9,d9,f9,d9,99,9d
 First GPA5 flipping, and then more complicated in the last phase:
 11011001
 10011001
 10011101
 -> GPA6 cleared, GPA2 set.
 on insert     :
                  d9,f9,d9,f9,d9,f9
 Here is only GPA5 flipping ?

 PADDR is always 'fd'. 
 PBDDR is             '71'.
 There is a bug in the SA1101 manual,
 it is not clear what is input and what is output, but one can guess.

 Somebody should fix the sa1100_jornada820.c driver :)

 Oleg.