gpio/omap: remove suspend/resume callbacks
gpio/omap: remove suspend/resume callbacks

Both omap_gpio_suspend() and omap_gpio_resume() does programming
of wakeup_en register.
_gpio_rmw(base, bank->regs->wkup_en, 0xffffffff, 0);
_gpio_rmw(base, bank->regs->wkup_en, bank->context.wake_en, 1);

This is redundant in omap_gpio_suspend() because wakeup_en
register automatically gets initialized in _set_gpio_wakeup()
and set_gpio_trigger() while being called either from
chip.irq_set_wake() or chip.irq_set_type().

This is also redundant in omap_gpio_resume() because wakeup_en
register is programmed in omap_gpio_restore_context() called
which is called from runtime resume callback.

Cc: Kevin Hilman <f9849b02abe18c1ece6bd40346458ed53f49d31b@ti.com>
Cc: Tony Lindgren <1001e8702733cced254345e193c88aaa47a4f5de@atomide.com>
Cc: Santosh Shilimkar <5b4d8dc9ea337fff5fd1729321eda9873ade0b09@ti.com>
Cc: Cousson, Benoit <1f57ac750b0b4fd69f24c35d4e23093b91dc3e77@ti.com>
Cc: Grant Likely <9069e6f5a2b566e2674a0ba1e2bf39c12c195fad@secretlab.ca>
Signed-off-by: Tarun Kanti DebBarma <466c3e31e36c5952b62acbdc5f3c0bc7bd450d87@ti.com>
Reviewed-by: Santosh Shilimkar <5b4d8dc9ea337fff5fd1729321eda9873ade0b09@ti.com>
Tested-by: Govindraj.R <f4f6ed1f4b62867ce26898e63a0cee63dab427c0@ti.com>
Signed-off-by: Kevin Hilman <f9849b02abe18c1ece6bd40346458ed53f49d31b@ti.com>

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