bsp/aarch64/raspberrypi: Add I2C Support

- Implements polling-based I2C communication.
- Supports three independent I2C master controllers.
- Adds support for 10-bit addressing mode.

spec/build/bsps/aarch64/raspberrypi/bspraspberrypi4.yml

@@ -67,6 +67,8 @@ links:
   uid: objwatchdog
 - role: build-dependency
   uid: objpwm
+- role: build-dependency
+  uid: obji2c
 source:
 - bsps/aarch64/raspberrypi/fdt/bsp_fdt.c
 - bsps/aarch64/raspberrypi/fdt/rpi4b_dtb.c

spec/build/bsps/aarch64/raspberrypi/obji2c.yml

@@ -0,0 +1,17 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+build-type: objects
+cflags: []
+copyrights:
+- Copyright (C) 2025 Shaunak Datar
+cppflags: []
+cxxflags: []
+enabled-by: true
+includes: []
+install:
+- destination: ${BSP_INCLUDEDIR}/bsp
+  source:
+  - bsps/aarch64/raspberrypi/include/bsp/raspberrypi-i2c.h
+links: []
+source:
+- bsps/aarch64/raspberrypi/i2c/raspberrypi-i2c.c
+type: build