sys_log: replace old debug macros at DesignWare USB driver

DesignWare USB driver is now using new system log macros, updated
the Kconfig variable to be a level rather than a bool and the .conf
files at samples.

JIRA: ZEP-311

Change-Id: Ief46cadd954ca4b30a3a1cf2eba6e44ccbc9bc9f
Signed-off-by: Genaro Saucedo Tejada <genaro.saucedo.tejada@intel.com>
4 files changed