misc: microchip: pci1xxxx: Add support to read and write into PCI1XXXX OTP via NVMEM sysfs

Microchip's pci1xxxx is an unmanaged PCIe3.1a switch for consumer,
industrial, and automotive applications. This switch integrates OTP
and EEPROM to enable customization of the part in the field. This
patch adds support to read and write into PCI1XXXX OTP via NVMEM sysfs.

Signed-off-by: Kumaravel Thiagarajan <kumaravel.thiagarajan@microchip.com>
Co-developed-by: Tharun Kumar P <tharunkumar.pasumarthi@microchip.com>
Signed-off-by: Tharun Kumar P <tharunkumar.pasumarthi@microchip.com>
Co-developed-by: Vaibhaav Ram T.L <vaibhaavram.tl@microchip.com>
Signed-off-by: Vaibhaav Ram T.L <vaibhaavram.tl@microchip.com>
Link: https://lore.kernel.org/r/20230620143520.858-2-vaibhaavram.tl@microchip.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>