parisc: Use the generic IO helpers

This enables the parisc to use <asm-generic/io.h> to fill in the
missing (undefined) [read|write]sq I/O accessor functions.

This is needed if parisc[64] ever wants to uses CONFIG_REGMAP_MMIO
which has been patches to use accelerated _noinc accessors
such as readsq/writesq that parisc64, while being a 64bit platform,
as of now not yet provide.

This comes with the requirement that everything the architecture
already provides needs to be defined, rather than just being,
say, static inline functions.

Bite the bullet and just provide the definitions and make it work.
Compile-tested on parisc32 and parisc64. Drop some of the __raw
functions that now get implemented in <asm-generic/io.h>.

Reported-by: kernel test robot <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
Cc: James E.J. Bottomley <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Mark Brown <[email protected]>
Cc: John David Anglin <[email protected]>
Link: https://lore.kernel.org/linux-arm-kernel/62fcc351.hAyADB%2FY8JTxz+kh%[email protected]/
Signed-off-by: Arnd Bergmann <[email protected]>

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