arm64: dts: ti: k3-am642-evm: Add support for SPI EEPROM

commit e4a69ec3848d71028363e581ac32d7e65da66fea from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git

Add pinmux details and device tree node for the EEPROM attached to SPI0
module in main domain.

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>