Rename POC registers.
The current code uses POC1-POC3.
The datasheet uses:
POC1: Port Control 0
POC1: Port Control 1
POC2: Port Control 2
So the first POC1 is a typo that should have been POC0, rename the
registers to POC0-POC2 accordingly.
Signed-off-by: Tobias Diedrich <ranma+openwrt@tdiedrich.de>
SVN-Revision: 33302