mx28evk: Fix PSWITCH key position

Fix the position for PSWITCH key.

The good benefit of doing this is that boot time is greatly reduced:
from 5 seconds to less then 1 second.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>

doc/README.mx28evk

@@ -17,7 +17,7 @@ Jumper configuration
 To boot MX28EVK from an SD card, set the boot mode DIP switches as:
 
    * Boot Mode Select: 1 0 0 1 (Boot from SD card Slot 0 - U42)
-   * JTAG PSWITCH RESET: To the left (reset enabled)
+   * JTAG PSWITCH RESET: To the right (reset disabled)
    * Battery Source: Down
    * Wall 5V: Up
    * VDD 5V: To the left (off)