a71ch: Serialize access to li2c APIs
a71ch: Serialize access to li2c APIs

Avoid duplicate initialization of lpi2c_rtos_handle_t for i2c5.

Avoid contention when accessing the underlying i2c driver by wrapping
each transaction with the new APIs LPI2C_RTOS_Lock/LPI2C_RTOS_Unlock.

Change-Id: I6d53c8cf35e4ca5a9af2ac5b0609c6706c4aa37e
GitOrigin-RevId: d182c2d9e0dcb8be8f2e89eee1d261705dcf4222

google-coral/coralmicro,google-coral/coralmicro,google-coral/coralmicro,google-coral/coralmicro,google-coral/coralmicro