init: Kconfig: Don't force DEBUG_KERNEL
lib: Kconfig.debug: Don't force DEBUG_BUGVERBOSE
ARM: dts: hammerhead: Change i2c clock rate to 19.2 MHz

Referenced CAF: https://www.codeaurora.org/cgit/quic/la/kernel/msm/commit/arch/arm/boot/dts/msm8974.dtsi?h=kk_3.5&id=2762366bdeb1d2d3bb43ffb21ad3a0908d51551e
Revert "ARM: dts: msm: Add entry for relocatable pil heaps for 8974"

This reverts commit 13a3a7ed9ca391c02b9ddfed57b8eb77c4ba12d0.

We're still using old fw, so this is a waste of memory. This reclaims 30MB of RAM.
ARM: dts: hammerhead: Remove DSI traffic-mode definition

DSI traffic mode is only relevant for video-mode panels. We use command mode.
hammerhead_defconfig: Clean up and optimize