arm64: dts: aspeed: Fix duplicate pinctrl labels and address scheme

arm64: dts: aspeed: Fix duplicate pinctrl labels and address scheme

A report from shashiko-bot highlighted some concerns concurrent to
application of the series[1].

Fix duplicate pinctrl_tach{0-15} and pinctrl_n{cts,dcd,dsr,ri}5 labels
in aspeed-g7-soc1-pinctrl.dtsi. These didn't cause errors from dtc
because dtc accepts duplicate labels for duplicate nodes specified
through a node reference[2].

Drop the cpu-index from secondary/tertiary container nodes: reduce
the "#address-cells" from 2 to 1 and update unit-addresses and reg
accordingly. The 2-cell scheme was proposed in an early mailing list
sketch to prompt discussion[3], but the design evolved in ways that made
it unnecessary.

Also remove URL comments from the DTS. The links were to comments in
the kernel sources with discussion justifying the approach, but are not
necessary to carry forward.

[arj: Extend discussion in the commit message]

Link: https://lore.kernel.org/all/20260609025708.ADBFE1F00893@smtp.kernel.org/
Link: https://lore.kernel.org/all/b226339bb2abe42ce23e90eadbc654b426131083.camel@codeconstruct.com.au/
Link: https://lore.kernel.org/all/1a2ca78746e00c2ec4bfc2953a897c48376ed36f.camel@codeconstruct.com.au/
Suggested-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Fixes: e77bb5dc5759 ("arm64: dts: aspeed: Add initial AST27xx SoC device tree")
Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
Link: https://patch.msgid.link/20260611-dtsi_fix-v1-1-ef2b7cd86d6d@aspeedtech.com
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Link: https://lore.kernel.org/r/20260612-aspeed-arm64-dt-v1-1-d1d1a4737905@codeconstruct.com.au
Signed-off-by: Arnd Bergmann <arnd@arndb.de>