ARM: SAMSUNG: use devm_ functions for ADC driver
ARM: SAMSUNG: use devm_ functions for ADC driver

This patch uses devm_* functions for probe function in ADC driver.
It reduces code size and simplifies the code.

Signed-off-by: Eunki Kim <bfbb02d7faad471aff410bb6e798dcea7e576162@samsung.com>
Signed-off-by: Kukjin Kim <3fc711f4e08bc570a586748633ff7c76d0e1e253@samsung.com>

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