rtc: add support for rtc ds1343 and ds1344

reviewed the code and changed the file name
to rtcds1343 and added headers and removeed
bugs and now only need to comment , modify
makefile and Kconfig file and submit, which
may happen till 13-4-14

Signed-off-by: Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>