x86 & arm: remove CAM_DEBUG_FLAGS= from MMCCAM kernels

we leave `options CAMDEBUG` enabled, so that when needed, CAM debugging
can be enabled *as needed*, rather than setting a default of everything.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/798

amd64: switch GENERIC-MMCCAM to GENERIC

arm's and arm64's GENERIC-MMCCAM is based on GENERIC. amd64's is based
on MINIMAL. For consistency, switch it to GENERIC.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/798

sys: Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

amd64 kernel config: clean up whitespace

Most options in kernel config files use "options<space><tab>OPTION".
This allows the option to be commented out without shifting columns.
A few options had two tabs, and some had spaces. Make them consistent.

Exclude MMCCAM kernels from make universe

They don't provide any value and are quite arbitrary.

Note arm64 GENERIC-MMCCAM was already excluded, just not the NODEBUG
variant.

The option is already build-tested with arm64 LINT kernel.

Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D38458

Fix amd64 GENERIC-MMCCAM kernel build

c4df8cbfde53c376d93f439eac3f45a7b4fc705e removed bvmconsole and
bvmdebug, but missed the bvmconsole entry in GENERIC-MMCCAM.

Address the warning regarding duplicate option 'GEOM_PART_GPT' when
configuring kernels for i386, amd64, and arm64.
The 'GEOM_PART_GPT' option was added to the DEFAULTS configuration
in r337967.

Approved by: re (kib@)
Reviewed by: ler@
Differential Revision: https://reviews.freebsd.org/D17458
Sponsored by: Netflix, Inc.

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