drivers: hwinfo: mcux_src_rev2: Change it to native driver

The reset source is SOC specific, MCUX SDK SRC driver is
also SOC specific, it doesn't mask the SOC differences.
So the driver can use SOC macros directly, and handle SOC
differences in the hwinfo driver, not necessary to wrap
MCUX SDK driver.

Signed-off-by: Jason Yu <zejiang.yu@nxp.com>