tpm: atmel: depend on X86

tpm_atmel probes for the chip at fixed x86 Super-I/O ports (0x4e) with
inb()/outb(), so it only works on x86. TCG_ATMEL nevertheless depends
only on HAS_IOPORT_MAP/HAS_IOPORT, which arm and arm64 also satisfy.
There the probe is useless, and on platforms whose unbacked I/O access
faults it oopses in init_atmel() at boot (e.g. arm/versatile):

  Unable to handle kernel paging request at virtual address fee0004e
  PC is at init_atmel+0x34/0x244

TCG_NSC and TCG_TIS already "depends on X86" (commit 2f592f2a7d74 ("TPM:
NSC and TIS drivers X86 dependency fix")); TCG_ATMEL was missed. Add the
same dependency.

Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lore.kernel.org/r/20260712183234.23125-1-kmehltretter@gmail.com
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>

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