sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

arm/arm64 nvidia: Remove unused devclass arguments to DRIVER_MODULE.

arm/arm64 nvidia: Remove unused variables.

arm: clean up empty lines in .c and .h files

Clean up OF_getprop_alloc API

OF_getprop_alloc takes element size argument and returns number of
elements in the property. There are valid use cases for such behavior
but mostly API consumers pass 1 as element size to get string
properties. What API users would expect from OF_getprop_alloc is to be
a combination of malloc + OF_getprop with the same semantic of return
value. This patch modifies API signature to match these expectations.

For the valid use cases with element size != 1 and to reduce
modification scope new OF_getprop_alloc_multi function has been
introduced that behaves the same way OF_getprop_alloc behaved prior to
this patch.

Reviewed by: ian, manu
Differential Revision: https://reviews.freebsd.org/D14850

Switch users of fdt_is_enabled to use ofw_bus_node_status_okay. These are
equivalent, so to prepare to remove the former move users to call the
latter.

Sponsored by: DARPA, AFRL

TEGRA: Prepare Tegra subtree for inclusion into ARM generic kernel.
- use DEFINE_CLASS_0() for driver classes
- unify driver names
- cleanup driver definitions and bindings

Use OF_prop_free instead of direct call to free(9)

Reviewed by: mmel@

Import basic support for Nvidia Jetson TK1 board and tegra124 SoC.
The following pheripherals are supported: UART, MMC, AHCI, EHCI, PCIe, I2C,
PMIC, GPIO, CPU temperature and clock.

Note: The PCIe driver is pure mash at this moment. It will be reworked
immediately when both D5237 and D2579 enter the current tree.