i2c: ismt: Adding support for I2C_SMBUS_BLOCK_PROC_CALL

Expand the driver to support I2C_SMBUS_BLOCK_PROC_CALL since
HW supports it already.

Co-developed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mario Alejandro Posso Escobar <mario.posso.escobar@intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>