i2c: mlxbf: support BlueField-3 SoC

BlueField-3 SoC has the same I2C IP logic as previous
BlueField-1 and 2 SoCs but it has different registers' addresses.
This is an effort to keep this driver generic across all
BlueField generations.
This patch breaks down the "smbus" resource into 3 separate
resources to enable us to use common registers' offsets for all
BlueField SoCs:
struct mlxbf_i2c_resource *timer;
struct mlxbf_i2c_resource *mst;
struct mlxbf_i2c_resource *slv;

Of course, all offsets had to be adjusted accordingly, and we took
this chance to reorganize the macros depending on the register block
they target.

There are only 2 registers' offsets that do not fit within this
schema so their offsets are passed as SoC-specific parameters:
smbus_master_rs_bytes_off
smbus_master_fsm_off
Reviewed-by: Khalil Blaiech <kblaiech@nvidia.com>
Signed-off-by: Asmaa Mnebhi <asmaa@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

MAINTAINERS

@@ -12984,6 +12984,7 @@ F:	drivers/input/touchscreen/melfas_mip4.c
 
 MELLANOX BLUEFIELD I2C DRIVER
 M:	Khalil Blaiech <kblaiech@nvidia.com>
+M:	Asmaa Mnebhi <asmaa@nvidia.com>
 L:	linux-i2c@vger.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/i2c/mellanox,i2c-mlxbf.yaml