presto: defconfig: panic_timeout set to default

Presto used default CONFIG_PANIC_TIMEOUT to fix random reboots.
Thanks:@Snuzzo.

Change-Id: Ief57f1632b72a323b4a6923a4e8a70f15ea6688f
Merge pull request #8 from shaheerkv/cm-11.0-exp1

presto: defconfig: panic_timeout set to default