defconfig: arm64: Enable wdog ping to cores in low power mode for SDM855

The watchdog IPI optimization is to not ping cores
in low power modes at pet time, which is enabled by default.
Disable this optimization in debug image of SDM855 SoC.

Change-Id: I87fcd4b6305622fe44a554b81ab0a2da92c11793
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>