Fix PCF files to match README

[elms]

No description provided.

[cliffordwolf]

The README file says:

As a temporary hack, CSB is connected via P1B1 on both boards and CLK is connected via P1B2 on both boards.

So the current PCF files do match the current README afaics.

[cliffordwolf]

(The reason for this "temporary hack" is that I see signal integrity issues on the CLK line when using the other pins. I still need to figure out why exactly this is happening.)

[elms]

I saw the updated table shows PMOD2, but not the PCF. I think it should be consistent.

Also the commented out PMOD2 set_io were switched.

#set_io qpi_csb    2	
#set_io qpi_clk    4

To match the README it should be

set_io qpi_csb    4
set_io qpi_clk    2