tpm: tis_i2c: Add compatible string nuvoton,npct75x

tpm: tis_i2c: Add compatible string nuvoton,npct75x

Add "nuvoton,npct75x" as well as the fallback compatible string
"tcg,tpm-tis-i2c" to the TPM TIS I²C driver.  They're used by:

  arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-bonnell.dts
  arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-everest.dts

And by all accounts, NPCT75x is supported by the driver:

  https://lore.kernel.org/all/60e23fd0f0ff4d1f8954034237ae8865@NTILML02.nuvoton.com/
  https://lore.kernel.org/all/20220808220839.1006341-8-peter@pjd.dev/

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>