Fix & optimization
+ drivers/misc/pm8xxx-vibrator.c: disable meaningless dmesg log spam. ported from (https://github.com/rmbq/android_kernel_htc_msm8960/commit/4c6ec0084751ebcec6b594ddde9b1cd82d4771a6)
+ drivers/input/evbug.c: silence annoying dmesg log spam. ported from (https://github.com/rmbq/android_kernel_htc_msm8960/commit/f07a626637fb561d302384d4bab659d41f30c935)