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

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

fu740_pci_dw: Add SiFive FU740 PCIe controller driver

Reviewed by: mhorne
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D31033

sifive_gpio: Add SiFive GPIO controller driver

This is present on both the FU540 and FU740, but only needed for the
FU740 in order to assert reset and power enable signals for its PCIe
controller.

sifive_gpio: Add SiFive GPIO controller driver

This is present on both the FU540 and FU740, but only needed for the
FU740 in order to assert reset and power enable signals for its PCIe
controller.

Reviewed by: mhorne
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D31031

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fu540_spi: Rename to sifive_spi

The FU740 also uses the same SPI controller.

Reviewed by: kp, philip
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D31026

fu540_prci: Rename to sifive_prci and use ocd_data for FU540 specificity

The FU740 has a very similar controller and will reuse most of the
driver. This also drops the dependency on the device-tree

fu540_prci: Rename to sifive_prci and use ocd_data for FU540 specificity

The FU740 has a very similar controller and will reuse most of the
driver. This also drops the dependency on the device-tree include for
the binding indices; the header doesn't namespace its contents (and nor
does the FU740 one) so using both would require seperate translation
units which would be unnecessarily complicated just to avoid defining
local copies of the small number of constants.

Whilst here, add the missing l to gemgxlclk's name and drop the prci_
prefix from tlclk's name as we don't prefix any of the others and it's
entirely unnecessary.

Reviewed by: kp, mhorne
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D31021

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riscv/sifive: add FE310 Always-on driver

This driver supports SiFive's FE310 Always-on (AON) peripheral's
Real-time clock (RTC) and Watchdog timer (WDT). AON has other
functionality that this driver

riscv/sifive: add FE310 Always-on driver

This driver supports SiFive's FE310 Always-on (AON) peripheral's
Real-time clock (RTC) and Watchdog timer (WDT). AON has other
functionality that this driver could support such as the power
management unit (PMU) but that functionality hasn't been implemented.

Reviewed by: philip (mentor), kp (mentor)
Approved by: philip (mentor)
Sponsored by: Axiado
Differential Revision: https://reviews.freebsd.org/D24170

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sifive: uart driver

Implement support for the UART as found on the SiFive FU540. It should
also work on, but has not been tested with, the FU310.

Reviewed by: philip
Sponsored by: Axiado

riscv/sifive: add FU540 SPI controller driver

Initial working prototype of the Serial Peripheral Interface controller
in the SiFive FU540 SoC.

Reviewed by: kp
Sponsored by: Axiado

riscv/sifive: add SiFive FU540 PRCI driver

The SiFive FU540 Power Reset Clocking Interrupt block contains a PLL
that turns the input crystal (33.3MHz) into a 1-1.5GHz clock.
This clock in turn is di

riscv/sifive: add SiFive FU540 PRCI driver

The SiFive FU540 Power Reset Clocking Interrupt block contains a PLL
that turns the input crystal (33.3MHz) into a 1-1.5GHz clock.
This clock in turn is divided by two to produce the tlclk, which is fed
into devices such as the SPI and I2C controllers.

Register a new clock device for the PRCI so that those devices can
read the correct clock through the clk framework.

Submitted by: kp
Sponsored by: Axiado

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