fdts: stm32mp1: add the I2C2 peripheral in the SoC DTS

Some STM32MP1‐based boards, like Seeed Studio’s SoM‐STM32MP157C, have
the SoC connected to the PMIC via I2C2 instead of I2C4 (which is used on
the official ST development boards). This commit brings TF‑A one step
closer to boot on such boards.

Signed-off-by: Grzegorz Szymaszek <gszymaszek@short.pl>
Change-Id: Iec9c80f29ce95496e8f1b079b7a23f1914b74901
1 file changed