Review comments were incorporated to improve the driver.

1. Some data was eliminated that was not needed.
2. Renaming of variables for clarity.
3. Removed unneeded type casting.
4. Changed to use dev_err rather than other I/O.
5. Merged together some functions.
6. Added kerneldoc format to functions.
Signed-off-by: NSadanand <sadanan@xilinx.com>
Signed-off-by: NJohn Linn <john.linn@xilinx.com>
Acked-by: NPeter Korsgaard <jacmet@sunsite.dk>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

drivers/input/serio/xilinx_ps2.c:272: warning: cast from pointer
to integer of different size
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Added a new driver for Xilinx XPS PS2 IP. This driver is
a flat driver to better match the Linux driver pattern.
Signed-off-by: NSadanand <sadanan@xilinx.com>
Signed-off-by: NJohn Linn <john.linn@xilinx.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>