i2c: mlxbf: Allow build with COMPILE_TEST

Extend the Kconfig dependency to include COMPILE_TEST so the
Mellanox BlueField I2C driver can be built on non-ARM64 platforms
for compile testing purposes.

Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Cc: Khalil Blaiech <kblaiech@nvidia.com>
Cc: Asmaa Mnebhi <asmaa@nvidia.com>
Link: https://lore.kernel.org/r/20250505215854.2896383-1-andi.shyti@kernel.org

Author: Andi Shyti

drivers/i2c/busses/Kconfig

@@ -856,7 +856,7 @@ config I2C_LS2X
 
 config I2C_MLXBF
         tristate "Mellanox BlueField I2C controller"
-        depends on MELLANOX_PLATFORM && ARM64
+        depends on (MELLANOX_PLATFORM && ARM64) || COMPILE_TEST
 	depends on ACPI
 	select I2C_SLAVE
         help