RTC: sa1100: Update the sa1100 RTC driver.
RTC: sa1100: Update the sa1100 RTC driver.

Since PIE interrupts are now emulated, this patch removes the previous
code that used the hardware counters.

The removal of read_callback() also fixes a wrong user space behaviour
of this driver, which was not returning the right value to read().

[john.stultz: Merge fixups]

CC: Thomas Gleixner <00e4cf8f46a57000a44449bf9dd8cbbcc209fd2a@linutronix.de>
CC: Alessandro Zummo <f0b9bd96bf07bfecc189c62159960134588fafe5@towertech.it>
CC: Marcelo Roberto Jimenez <cbfee7cc2b5ad5adb7c008f3609da41bdbf85ffa@cpti.cetuc.puc-rio.br>
CC: 2c98ab252b0688038c565f7a1df1d99710e84d7a@googlegroups.com
Signed-off-by: Marcelo Roberto Jimenez <cbfee7cc2b5ad5adb7c008f3609da41bdbf85ffa@cpti.cetuc.puc-rio.br>
Signed-off-by: John Stultz <33837adfb53316eae44aad04041e1240088d76fd@linaro.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs