riscv: dts: canaan: Disable I/O devices unless used

It is considered good practice to disable on-SoC devices providing
external I/O in the SoC-specific .dtsi, and enable them explicitly in
the board

riscv: dts: canaan: Disable I/O devices unless used

It is considered good practice to disable on-SoC devices providing
external I/O in the SoC-specific .dtsi, and enable them explicitly in
the board-specific DTS files when actually wired-up and used.

Hence:
- Set the status of I/O devices in k210.dtsi to "disabled",
- Override the status of used I/O devices in board-specific DTS files
to "okay",
- Drop unneeded status overrides in board DTS-specific files for the
always-enabled pin controller.

On e.g. MAiXBiT, this gets rid of an error message when probing the
unused slave-only spi2 controller:

dw_spi_mmio 50240000.spi: error -22: problem registering spi host
dw_spi_mmio 50240000.spi: probe with driver dw_spi_mmio failed with error -22

which is seen since commit 98d75b9ef282f6b9 ("spi: dw: Drop default
number of CS setting").

Signed-off-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Damien Le Moal <[email protected]>
Signed-off-by: Conor Dooley <[email protected]>

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riscv: dts: canaan: Clean up serial aliases

The SoC-specific k210.dtsi declares aliases for all four serial ports.
However, none of the board-specific DTS files configure pin control for
any but the

riscv: dts: canaan: Clean up serial aliases

The SoC-specific k210.dtsi declares aliases for all four serial ports.
However, none of the board-specific DTS files configure pin control for
any but the first serial port, so the last three ports are not usable.

Move the aliases node from the SoC-specific k210.dtsi to the
board-specific DTS files, as these are really board-specific, and retain
the sole port that is usable.

Signed-off-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Damien Le Moal <[email protected]>
Signed-off-by: Conor Dooley <[email protected]>

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