Remove residual blank line at start of Makefile

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

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

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

iicoc: support building as a module

Only build on RISC-V for now, since we're not aware of any other cores
with this IP supported by FreeBSD.

Reviewed by: jrtc27, philip
MFC after: 3 days
Different

iicoc: support building as a module

Only build on RISC-V for now, since we're not aware of any other cores
with this IP supported by FreeBSD.

Reviewed by: jrtc27, philip
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D32737

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imcsmb(4): Intel integrated Memory Controller (iMC) SMBus controller driver

imcsmb(4) provides smbus(4) support for the SMBus controller functionality
in the integrated Memory Controllers (iMCs) emb

imcsmb(4): Intel integrated Memory Controller (iMC) SMBus controller driver

imcsmb(4) provides smbus(4) support for the SMBus controller functionality
in the integrated Memory Controllers (iMCs) embedded in Intel Sandybridge-
Xeon, Ivybridge-Xeon, Haswell-Xeon, and Broadwell-Xeon CPUs. Each CPU
implements one or more iMCs, depending on the number of cores; each iMC
implements two SMBus controllers (iMC-SMBs).

*** IMPORTANT NOTE ***
Because motherboard firmware or the BMC might try to use the iMC-SMBs for
monitoring DIMM temperatures and/or managing an NVDIMM, the driver might
need to temporarily disable those functions, or take a hardware interlock,
before using the iMC-SMBs. Details on how to do this may vary from board to
board, and the procedure may be proprietary. It is strongly suggested that
anyone wishing to use this driver contact their motherboard vendor, and
modify the driver as described in the manual page and in the driver itself.
(For what it's worth, the driver as-is has been tested on various SuperMicro
motherboards.)

Reviewed by: avg, jhb
MFC after: 1 week
Relnotes: yes
Sponsored by: Panasas
Differential Revision: https://reviews.freebsd.org/D14447
Discussed with: avg, ian, jhb
Tested by: allanjude (previous version), Panasas

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MFhead@r313243

Merge ^/head r312894 through r312967.

Remove pc98 support completely.
I thank all developers and contributors for pc98.

Relnotes: yes

Catch up with HEAD (r280229-r284686).

Merge from head

Merge ^/head r283596 through r283770.

ig4 - Intel fourth gen integrated I2C SMBus driver.

Differential Revision: https://reviews.freebsd.org/D2372
Reviewed by: jhb, wblock, adrian
Approved by: jhb, wblock
Relnotes: yes

Merge head from 7/28

MFC @ r266724

An SVM update will follow this.

Add ismt(4) driver.

ismt(4) supports the SMBus Message Transport controller found on Intel
C2000 series (Avoton) and S1200 series (Briarwood) Atom SoCs.

Sponsored by: Intel

Drivers for AMD-8111 and NVIDIA nForce2/3/4 SMBus 2.0 controllers.

Hook ichsmb to build.

Most power management devices don't exist on pc98.

amdpm was omitted from the build of i2c controllers. Fixed.

Major rework of the iicbus/smbus framework:

- VIA chipset SMBus controllers added
- alpm driver updated
- Support for dynamic modules added
- bktr FreeBSD smbus updated but not tested
- cleanup

Drivers for AMD-8111 and NVIDIA nForce2/3/4 SMBus 2.0 controllers.

Hook ichsmb to build.

Most power management devices don't exist on pc98.

amdpm was omitted from the build of i2c controllers. Fixed.

Major rework of the iicbus/smbus framework:

- VIA chipset SMBus controllers added
- alpm driver updated
- Support for dynamic modules added
- bktr FreeBSD smbus updated but not tested
- cleanup