HomeFreeBSD

Add MMCCAM-enabled kernel config for IMX6, reduce debug noice in MMCCAM kernels

Description

Add MMCCAM-enabled kernel config for IMX6, reduce debug noice in MMCCAM kernels

CAM_DEBUG_TRACE results in way too much debug output than needed now.
When debugging, it's always possible to turn on trace level using camcontrol.

Approved by: imp (mentor)
Differential Revision: https://reviews.freebsd.org/D12110