Remove unnecessary include of <sys/malloc.h>.

rearrange to avoid allocating softc on stack in ug_isa_match()

Constify ug2_mb[], so that it lands in .rodata.

Initialize sensor states before registering

Split device_t/softc for ug(4) and other related cosmetic changes.

initialize via sysmon_envsys_create()
make sensors valid

Extend the envsys2 API (one more time, sorry) as defined in:

http://mail-index.netbsd.org/tech-kern/2007/11/09/0001.html

sysmon_envsys_create() and sysmon_envsys_destroy() were added to
create/dest

Extend the envsys2 API (one more time, sorry) as defined in:

http://mail-index.netbsd.org/tech-kern/2007/11/09/0001.html

sysmon_envsys_create() and sysmon_envsys_destroy() were added to
create/destroy sysmon_envsys objects (and its TAILQ/LIST for sensors/events).

sysmon_envsys_sensor_attach() and sysmon_envsys_sensor_detach() were
added to attach/detach sensors to a specified sysmon_envsys device.

The events framework is now per device and configurable via the
ENVSYS_SETDICTIONARY ioctl or /etc/envsys.conf and envstat(8).

Update all users and documentation to reflect these changes.

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machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

ug_gtredata: add another break in the default case. Just for consistency
with other code.

ug2_gtredata: add missing break in default case.

ug*_gtredata: use the edata pointer rather than using the edata array
index.

There's no need to use another envsys_data_t pointer that points to
the sensor specified in the softc, use edata passed in by the gtredata
function. Also remove a line of code that is not needed anym

There's no need to use another envsys_data_t pointer that points to
the sensor specified in the softc, use edata passed in by the gtredata
function. Also remove a line of code that is not needed anymore with
envsys2.

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Imported envsys 2, a brief description of the new features:
(Part 2: drivers)

* Support for detachable sensors.
* Cleaned up the API for simplicity and efficiency.
* Ability to send capacity/critica

Imported envsys 2, a brief description of the new features:
(Part 2: drivers)

* Support for detachable sensors.
* Cleaned up the API for simplicity and efficiency.
* Ability to send capacity/critical/warning events to powerd(8).
* Adapted all the code to the new locking order.
* Compatibility with the old envsys API: the ENVSYS_GTREINFO
and ENVSYS_GTREDATA ioctl(2)s are supported.
* Added support for a 'dictionary based communication channel' between
sysmon_power(9) and powerd(8), that means there is no 32 bytes event
size restriction anymore.
* Binary compatibility with old envstat(8) and powerd(8) via COMPAT_40.
* All drivers with the n^2 gtredata bug were fixed, PR kern/36226.

Tested by:

blymn: smsc(4).
bouyer: ipmi(4), mfi(4).
kefren: ug(4).
njoly: viaenv(4), adt7463.c.
riz: owtemp(4).
xtraeme: acpiacad(4), acpibat(4), acpitz(4), aiboost(4), it(4), lm(4).

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Missing __KERNEL_RCSID().

Split the ug(4) driver in three components:

* dev/ic/ug.c (main code shared by the attachments)
* dev/isa/ug_isa.c (isa attachment)
* dev/acpi/ug_acpi.c (acpi attachment)

That means that ug(4) c

Split the ug(4) driver in three components:

* dev/ic/ug.c (main code shared by the attachments)
* dev/isa/ug_isa.c (isa attachment)
* dev/acpi/ug_acpi.c (acpi attachment)

That means that ug(4) can now be attached via ACPI.

Thanks to Mihai Chelaru for the good work.

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