Fix compilation with excessive debugging disabled

Signed-off-by: Sultanxda <sultanxda@gmail.com>
selinux: Add gitignores
scsi: Remove scsi_wait_scan

We have no use for this.
Sultan_defconfig: Use -O2 optimization

In the CM kernel, using -O2 optimization causes the kernel to not boot, which is extremely unsettling.
input: touchscreen: Fix compilation with -O2