[PATCH] pcmcia: at91_cf update

This is an update to the AT91RM9200 CompactFlash driver.

The changes include:
- Use the I/O memory address passed via the platform_device resources
  instead of constant global values.
- The IRQ should not be used as a random'ness source.
- Return errors if ioremap() or request_mem_region() fails.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>