ARM: mach-shmobile: Tidy up the Kconfig bits.
Presently each one of the CPUs manually selects the same feature set, and there's a reasonable expectation that none of these will change for future CPUs in the SH-Mobile / R-Mobile family, so we move those over to the top-level ARCH_SHMOBILE. While we're at it, all of the CPUs support optional GPIOs via the PFC, do not have I/O ports, and expect sparse IRQ, so we bring the configuration in line across the board. This more or less brings the ARM-based parts in sync with their SH counterparts. Signed-off-by: Paul Mundt <firstname.lastname@example.org>
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