libraries: Wire: Instantiate Wire following dts configuration

[soburi]

Instaintiate Wire with i2c device that defined in 'i2cs' array under zephyr,user node. If 'i2cs' array is not defined, tries to instantiate with i2c device that labeled as 'arduino_i2c'.

As a result of apply new rule, the i2c_dev that declared in pinmap.h is no more used, remove it.

[DhruvaG2000]

@soburi kindly rebase and resolve conflicts. Thanks

[soburi]

@DhruvaG2000 Update done.

[DhruvaG2000]

Merged, Thanks!